13 best window mailing envelopes

Window mailing envelopes are a type of business envelope designed for mailing documents or letters. They are commonly used in offices for various purposes, such as sending invoices, statements, letters, and marketing materials. Here are some key points about window mailing envelopes:

  1. Design: Window mailing envelopes feature a transparent plastic window on the front.This window is typically covered by a transparent film or material, allowing the recipient's address to show through without exposing the contents of the envelope.

  2. Purpose: The main purpose of the window in these envelopes is to display the recipient's address, which can save time and ensure accuracy when mailing multiple documents. It eliminates the need for manually addressing each envelope.

  3. Sizes: Window mailing envelopes come in various sizes to accommodate different document sizes, including standard letter-sized (9" x 4"), legal-sized (9" x 4.5"), and other custom sizes.

  4. Materials: They are usually made from paper or paper-like materials, with varying thicknesses and levels of opacity. Some envelopes may have security features, such as anti-tampering patterns or watermarks.

  5. Sealing Methods: Window mailing envelopes can be sealed in several ways, including gummed adhesive strips, peel-and-seal closures, or self-seal flaps for easy and secure sealing.

  6. Window Sizes and Positions: The size and position of the window may vary depending on the envelope's design. Common window shapes include rectangular, square, or custom shapes to fit different types of mailing labels.

  7. Customization: Businesses often customize window mailing envelopes with their company logo, return address, or other branding elements. Customization can help enhance the professional appearance of mailings.

  8. Bulk Purchases: Window mailing envelopes are typically available for purchase in bulk, making them cost-effective for businesses that frequently send out mailings.

  9. Security: While window mailing envelopes are convenient for displaying addresses, it's important to ensure that sensitive information inside the envelope is adequately protected, especially when sending confidential documents.

  10. Environmental Considerations: Some window mailing envelopes are made from recycled or eco-friendly materials to minimize their environmental impact.

Window mailing envelopes are essential office supplies for businesses and organizations that send out a large volume of mail. They offer a practical and professional way to address and send documents efficiently while maintaining a neat and organized appearance.

Below you can find our editor's choice of the best window mailing envelopes on the market
  

SmartSign U-Channel Sign Post, Medium Weight | 6' Tall Baked Enamel Steel Post - Pack of 4

Lyle Signs

Based on 423 reviews Check latest price

Product description

Industry Leading Durability

With an outdoor life of at least 10 years, our sign posts certainly are the most durable in the market. U-channel sign posts look brand new even after years of exposure to sun, wind, and weather abuse. Baked-enamel coating extends the life of posts and makes them rust-proof.



USA’s Oldest Traffic Sign Post Manufacturer

Family owned since 1918, we take immense pride in our sign posts. Being one of the oldest certainly means we know this business in and out. Our South Dakota factory is the oldest manufacturer of metal signs and sign posts in the USA. Economical sign posts are ideal for property signs or for temporary signs.



Compliant

Our 6 feet tall and 2-1/4' wide sign post is compliant with NCHRP (National Cooperative Highway Research Program) 350 and approved for nationwide use

  • PRE-DRILLED. U-channel sign posts have pre-drilled holes measuring 3/8” in diameter located at the top 30 inches of the post.
  • MOUNT MULTIPLE SIGNS. Holes are 1 inch on center enabling you to easily align and mount your signs that are 12" x 18" or smaller.
  • MEDIUM WEIGHT. U-Channel posts weigh 1.12 pounds per foot of length.
  • INSTALLATION. Order with a portable sign base. Pack contains 4 posts.
  • PROTECTIVE COATING. Baked-on green enamel coating enhances outdoor life and prevents rusting of the steel post.

User questions & answers

Question: is the baked enamel finish better looking in person than the photograph provided? it looks terrible, all chipped and beat up
Answer: The majority of bubble wraps come in clear. I've never seen it come in frosted. I have seen it come in sable black (dark gray) and green. For insulating, it will certainly let the light through but it doesn't seem that it's easy to see through.
Question: What is the best way to attach a sign? With the narrow side or the wide side against the sign
Answer: One set of several sheets. I forget exactly how many.
Question: Is the bottom end pointed? Seems like it would be difficult to pound into rocky ground
Answer: I just know I got the labels. Don’t remember the details
Question: How do you install this
Answer: Yes they will stick on glass

Product features

What Height is Best?

8’ posts are most popular. 8’ posts are the standard for most parking lots, schools and malls.

6’ posts, however are easier to install and are are favored by home owners or for off-street installations. Assuming 1.5” below-ground depth, this gives a height of 3’ between the ground and the bottom of a typical 18” tall sign.

The hole spacing and hole size is standard across all post heights.

How to Install a Post

To achieve a sign height that can be seen over a parked SUV, we recommend using two overlapping 6’ posts. This also avoids the 'head knocker' hazard that can occur when a distracted pedestrian absentmindedly confronts shorter post and sign installation.

Try Two Posts Instead!

Professionals often use two overlapping 6’ 2 lbs posts. This gives the signs plenty of headroom (thereby avoiding needless pedestrian accidents). Installing two sign, surprisingly, can be quite easy. See the next photo. Generally, we recommend from 6” to 12” of overlap between the two posts. It is not possible to overlap two medium weight 1.12 lbs posts.

Attach the sign to the flange side of the 2nd post and lay this post on the ground near to buried post. Align the posts so that they will nest. Thread one bolt through both posts. Then swing up the second post to vertical and, on the top of the overlap, tighten the second bolt.

Pounding in the Post

Posts are generally pounded into the ground (unless a sand-filled sleeve is used). For all but the shortest posts, we recommend using the bed of a pickup truck as your platform.

Although post drive caps are used by professionals installing posts every day, most users find this unnecessary.

Avoid the Ladder

Trying to use a sledge hammer while perched on a ladder is an invitation for an accident. Use the stability of a pickup truck bed. Or start with a shorter post that can be driven more easily into the ground.

Highland Sticky Notes, 3 x 3 Inches, Yellow, 24 Pack

3M

Based on 3 reviews Check latest price

Product description

Highland(TM) Notes in 3 in x 3 in size are big enough to leave a note for a co-worker to return a call. Use the color Yellow to perk up your message. 24 Pads/Pack.

  • 3 in x 3 in, Yellow
  • Leave a note to return a call
  • Use the color Yellow to perk up your message
  • 24 Pads/Pack

User questions & answers

Question: How many sheets are in each pad
Answer: 100
Question: The sale description says 3x3 inches, but the product description says 2x6x6 inches which is it
Answer: Package size 2.6 x 6 x 6 inches. 3 x 3 is the size of the sheet of paper.
Question: Will these sticky enough to stick on a stucco wall
Answer: It will depend on the depth of the stucco; if you have the deep-grained stucco, NO; an I may add, that short of push pins, nothing will stick to that texture very long. A less course stucco the sticky notes may stick, they will stick when combined with some simple tape. Another choice is to get a piece of smooth plastic sheet, any hobby shop with EVERGREEN Plastic Products; get the sheeting and some plastic "boards" to frame it with, then hang the formed up plastic sheet, on the stucco wall, and BINGO there is your Sticky Note Info Center. ___________________ I hope this helps. Mike
Question: Are these the pop-up, accordion style or just the regular ones
Answer: These are just the regular ones.

PARTPHONER Outdoor Post Light with Pier Mount Base 6 Inch, Waterproof Pole Lantern Light Fixture, Exterior Lamp Post Lantern Head with Clear Glass Panels for Garden, Patio, Pathway (Black)

PARTPHONER

Based on 218 reviews Check latest price

Product description

Outdoor Post Lantern

  • 【Pier Mount Included】Extra pier mount base is included as a gift. This post light can be mounted on a pillar or column, or fit it with a 3" diameter mounting base.
  • 【Weather Resistant】Crafted from die-cast Aluminum and study clear glass, this outdoor post lantern can withstand any weather conditions, anti-rust and anti-corrosion.
  • 【Size】 Lamp Body: 6.5" x 5.7" x 18" (L x W x H, with base); Pier Mount Base: 5.5" x 5.5" (L x W).
  • 【E26 Base Max.100 W】 This post lantern is compatible with medium base incandescent, CFL or LED bulb, max 100 Watt. Bulb Is Not Included.
  • 【Wide Application】This post lantern can be a beautiful adornment for walkway, garages, porches, doorway, patio, garden or any other exterior and interior places.

User questions & answers

Question: Does this come with base to attach to
Answer: Wide side against the sign, just don't over tighten.
Question: Is this post light fixture waterproof
Answer: Hello, No the end of the post is not pointed. That definitely would of been a nice feature to add to this product. Barb wire fence post have a winged flange towards the bottom to hold in loose soil and to pile driving easier. I purchased this post to hold my whole house water filter. Outstanding product once it's in the ground. Happy Trails!!
Question: Can you use a dusk to dawn bulb in this post light
Answer: Some people hammer this into the ground a couple of feet (as property posts on animal farms that would have borbwire). For fences, digging a 20" circumference hole by another 2 feet deep, fill with quick-dry cement, to attach a driveway or roadway sign. Hope this helps
Question: Can this be tied into pathway lights that have a clip to wire system
Answer: Definitely easy to pop!! I've stepped on them several times by mistake, and a bunch of popping happens!

DJC Bike Suspension Seatpost Shock Absorber Damper Post 27.2 30.9 31.6 mm, Lightweight Aluminum Body

HL Corp

Based on 669 reviews Check latest price

Product description

DJC Bike Suspension Seatpost Shock Absorber Post

 

Features

  • Spring Coil Suspension: Build-in spring coil and damper rubber absorb the vibration while riding, the seat post comfort your riding experience, improve the shocks. Rebound force adjustable by tighten or loose the bottom screw. Suspension travel 42mm/ 1.65inch.
  • ★Pay Attention to Choose Correct Diameter Size★ . Wrong size will not work and will cause return. Take out your current seatpost, the diameter marked on it’s lower area. Then buy same size from the option.
  • Clamp Angle Adjustable: Saddle clamp angle can adjust in -5 degree to +18 degree. Clamp offset 14mm.
  • Excellent Quality: Produced by world largest bike components supplier HL CORP and comply to international bicycle safety standard ISO 4210. Full aluminum 6061 body ensure the lightweight, 27.2mm weight 498g/ 1.1lbs, 31.6mm weight 508g/ 1.2lbs. Surface anodized.
  • 2 Years Warranty: We are confident to the product quality and offer 2 years warranty. It fit for riders weight 50kg/ 110lbs to 100kg/ 220lbs(Clockwise the bottom screw if you are heavy, anticlockwise it if you are lightweight).

 

About ZOOM

HL CORP was founded in 1991. The company create famous brand ZOOM in the world with good quality, reasonable price, enjoying good reputation in the industry. HL CORP products are exported far to Europe, USA, ASIA. Its manufacturing and sales are in the leading positions in the industry. 

  • Spring Coil Suspension: Build-in spring coil and damper rubber absorb the vibration while riding, the seat post comfort your riding experience, improve the shocks. Rebound force adjustable by tighten or loose the bottom screw. Suspension travel 42mm/ 1.65inch.
  • ★Pay Attention to Choose Correct Diameter Size★ . Wrong size will not work and will cause return. Take out your current seatpost, the diameter marked on it’s lower area. Then buy same size from the option.
  • Clamp Angle Adjustable: Saddle clamp angle can adjust in -5 degree to +18 degree. Clamp offset 14mm.
  • Excellent Quality: Produced by world largest bike components supplier HL CORP and comply to international bicycle safety standard ISO 4210. Full aluminum 6061 body ensure the lightweight, 27.2mm weight 498g/ 1.1lbs, 31.6mm weight 508g/ 1.2lbs. Surface anodized.
  • 2 Years Warranty: We are confident to the product quality and offer 2 years warranty. It fit for riders weight 50kg/ 110lbs to 100kg/ 220lbs(Clockwise the bottom screw if you are heavy, anticlockwise it if you are lightweight).

User questions & answers

Question: I just installed the post on my bike, made few clockwise turns (tighten) but seat just sunk, cant feel rebound. I weigh 150 lbs. Suggestion please
Answer: Yes, This outside post lamp is waterproof
Question: Is the seat post shipped with an owners manual
Answer: Yes. You can use that bulb.
Question: My seat post says 31.8 will the 31.6 work? Does it come with a .2mm shim
Answer: I honestly don't know as I am not familiar with that system. It has two wires (black and white) and a ground wire.
Question: Will the 31.6 mm work on the lectric XP E-bike
Answer: Mine looked fine. Maybe a few chips from shipping.

Amazon Basics #9 Envelopes with Peel & Seal, Double Window, Security Tinted, 500-Pack

Amazon Basics

Based on 674 reviews Check latest price

Product description

An Amazon Brand

  • 500-count pack of #9 security envelopes with Peel & Seal closure—no moisture needed
  • Interior security tint keeps content private; securely send checks, invoices, or other confidential documents
  • Double window allows sender and recipient addresses to show through
  • 24-pound white wove paper for quality and strength; ideal for home or office
  • Measures 3-7/8 by 8-7/8 inches each

User questions & answers

Question: Is there a template I can download so my labels in the windows are placed properly
Answer: No idea I just fold the paper to fit
Question: Do these work for QuickBooks checks? Exact dimensions of all the openings & spaces
Answer: It is my understanding that Quickbooks check envelopes are #8 double window
Question: What are the dimensions of the top and bottom windows
Answer: Top - .875 x 3.375 Bottom - 1 x 4
Question: Will these fit quickbooks invoices
Answer: It is my understanding that #9 envelopes are indeed the fit for Quickbooks Invoices.

Amazon Basics #9 Double Window Security Tinted Envelopes, White, 500 ct

Amazon Basics

Based on 1 reviews Check latest price

Product description

An Amazon Brand

From the Manufacturer

AMZSM

  • 500 standard-size security-tinted #9 double window envelopes
  • Ideal for 8.5-by-11-inch computer-generated invoices and statements
  • Double windows 3/8-inch from the left to show sender info (2 inches from bottom) and recipient info (1/2 inch from bottom)
  • #9 envelopes measures 3-7/8 by 8-7/8 inches each

User questions & answers

Question: will these work for 3 part laser print checks
Answer: Mine was not shipped with a manual. It was literally in a bag, that's it. Bummed me out cause I'm not sure how to increase/decrease tension
Question: Are these recyclable
Answer: Typically seat post clamps can handle several mm of variation in seat post size, so you won't need a shim. Just turn the nut a quarter turn tighter then clamp it and you're good.
Question: Crazy trying to find envelops qb invoices. are the windows of envelopes fit the address section for qb
Answer: Yes. Just purchased two for my two XP E bikes. Made a big difference and I also purchased from Amazon two Cloud 9 seats. Unfortunately, those seats on the XP are Butt killers. Ride awhile, you will see what I mean.
Question: Will these work on 3up W2's from QuickBooks
Answer: The base comes with the lamp as shone in the photo. It also has screws for attaching to a wooden deck. Other than that, I am not sure what you are asking. You would need to purchase a post separately if that is what you mean.

Product features

9 Envelopes

Ideal for business mailings, these #9 double-window white envelopes work well for 8.5-by-11-inch statements and invoices.

Security Tint

The envelopes provide an interior security tint that prevents documents from being read through the envelope, even when held up to the light.

Double Viewing Windows

The envelopes feature double viewing windows that effortlessly align to properly display the names and addresses of the sender and recipient.

Ample Supply

No running out of envelopes anytime soon with this large supply of 500 envelopes. The pack works well for occasional, frequent, or bulk mailings.

500#8 Double Window Self Seal Security Envelopes - for Business Checks, QuickBooks & Quicken Checks, Size 3 5/8 x 8 11/16 Inches - Checks Fit Perfectly - Not for Invoices, 500 Count(30180)

Aimoh

Based on 309 reviews Check latest price
  • ✉️ PREMIUM SECURITY TINT CHECK ENVELOPES: Ultra Secure security tint pattern - Double Window Security Tinted Check Envelopes
  • ✉️ PERFECT SECURE DESIGN: Measures Perfectly 3 5/8 inch x 8 11/16 inch to prevent checks from sliding and moving unlike others on the market, securing sensitive information to remain hidden even through the two windows
  • ✉️ QUICK-SEAL SELF SEAL STRIP: Aimoh’s Double Window Security Tinted Self Seal Check Envelopes uses a premium adhesive peel and seal designed strip to create a strong, secure self-sealing seal
  • ✉️ DUAL WINDOW CUSTOM DESIGNED FOR MAILING BUSINESS CHECKS: Top Window height is 7/8 inch X 3-1/2 inches wide and is positioned 3/8 inch from the left and 2-3/8 inch from the bottom, Bottom Window height is 7/8 inch X 3-1/2 inch wide and is positioned 7/8 inches from the left and 3/4 inches from the bottom
  • ✉️ FIVE HUNDRED COUNT: each box contains a long lasting Five Hundred envelope supply, ideal for business and home office use

Amazon Basics #10 Security-Tinted Envelopes with Peel & Seal, Left Window, White, 500-Pack

Amazon Basics

Based on 12 reviews Check latest price

Product description

An Amazon Brand

  • 500-Pack of #10 security envelopes with Peel & Seal closure—no moisture needed
  • Ideal for home or office; securely send checks, invoices, or other confidential documents
  • Interior security tint keeps content private; single window allows address to show through
  • 24-pound white woven paper for quality and strength
  • Measures 4-1/8 by 9-1/2 inches each

User questions & answers

Question: How far is the window from the left edge? How far from the bottom edge
Answer: They're paper so technically yes. You should remove the plastic window if you want to make sure. We just recycle into our mixed paper bin. If you're asking if they're made from recycled paper, I don't think so.
Question: what is the size and location of the window from the left
Answer: The #10 size will probably fit the QB invoices just fine. Plus, you can go into the invoice template and move your address section just a bit. A no. 9 is really meant to fit inside a #10 as an enclosure envelope.
Question: Does the window has clear plastic cover
Answer: These do not work for our Quickbooks checks. The windows are a little off. I returned them. I really hate they don’t fit, they are good envelopes the windows are just not in exactly the right place! Such a good price, too.
Question: Are these envelopes heat resistant, meaning they could be printed with a laser printer without damage to the plastic window
Answer: If the seat sunk all the way in without rebound, it would mean the spring is missing entirely. Unscrew the bottom fully and shake the parts out.

Product features

Fast, Convenient Closure

The Amazon Basics #10 envelopes provide strong, reliable closure. Available in peel & seal or moisture seal.

Security Tint

Available with interior security tint to prevent viewing inside contents, and with or without preview window. Also available in standard white.

24-Pound Paper

Made of 24-pound white wove paper, the envelopes provide a smooth surface that works well for direct printing, labeling, or addressing by hand.

Stock Up

No running out of envelopes anytime soon with bulk 500-pack supply. Works well for occasional, frequent, or bulk mailings.

Amazon Basics Poly Bubble Mailer, 6" x 10" (Internal Size - 5.75" x 9"), White, 25-Pack

Amazon Basics

Based on 68 reviews Check latest price

Product description

An Amazon Brand

  • Poly bubble mailer (25-pack) for everyday packaging, shipping, and mailing; clean white color
  • Interior air-lock bubble lining (3/16-inch air bubbles) provides cushioning protection to items inside
  • Exterior made of thin polyethylene film for a smooth surface that’s easy to label; adhesive tear strip for a tight, secure seal
  • Maximum-strength design provides water- and tear-resistant performance
  • Measures 6 by 10 inches each; lightweight for lower mailing/shipping cost; backed by an Amazon Basics 1-year limited warranty

Amazon Basics Poly Bubble Mailer, 4" x 8" (Internal Size - 3.75" x 7"), White, 25-Pack

Amazon Basics

Based on 113 reviews Check latest price

Product description

An Amazon Brand

  • Poly bubble mailer (25-pack) for everyday packaging, shipping, and mailing; clean white color
  • Interior air-lock bubble lining (3/16-inch air bubbles) provides cushioning protection to items inside
  • Exterior made of thin polyethylene film for a smooth surface that’s easy to label; adhesive tear strip for a tight, secure seal
  • Maximum-strength design provides water- and tear-resistant performance
  • Measures 4 by 8 inches each; lightweight for lower mailing/shipping cost; backed by an Amazon Basics 1-year limited warranty

User questions & answers

Question: How eco-friendly are these bubble mailers
Answer: They are great I mail out jewelry and they are perfect for that
Question: I make jewelry and put my necklaces in necklace boxes, ans braclets in braclet boxes. Would they fit
Answer: You would need the larger size.
Question: Do these help protect items in hot weather
Answer: Yes
Question: What's the interior dimensions? Is it 4x8 on the inside or outside
Answer: The inside dimensions are more like 4x7.5

500#10 Single Left Window SELF Seal Security Envelopes - Super Strong Quick-Seal Self Sealing Closure, Security Tinted, Size 4-1/8 x 9-1/2 Inches, 24 LB - 500 Count (35210)

Aimoh

Based on 351 reviews Check latest price
  • #10 SINGLE WINDOW SECURITY ENVELOPES; forget cheap, thin envelopes that allow contents to be easily read, our #10 Security Envelopes are premium quality, ultra secure envelopes suitable for everyday business and legal mailing while protecting sensitive contents and information
  • ULTRA STRONG QUICK SEAL; manufactured with ultra strong, quick seal adhesive, creating a super strong seal across the width of the envelope for a strong seal that won’t easily tear, perfect for mailing larger, thicker documents
  • EASY READ SINGLE WINDOW; perfect for bulk mailing, each envelope has a premium, extra large, easy read 4-1/2 X 1-1/8 poly-window, positioned 7/8" from the left and 1/2" from the bottom of the envelope, perfect for displaying addresses or business information, making slow printing and hand addressing a thing of the past
  • SECURITY TINT PATTERN; mailing secure documents? Our #10 Security Envelopes are designed with a security wave pattern on the inside to protect contents, data and numbers from being easily read, unlike other cheap envelopes
  • LONG LASTING SUPPLY; ideal for everyday business use, each box provides 500 envelopes for a long lasting supply, each measuring 4-1/8 x 9-1/2 inches, perfect for invoices, statements and many more business uses! Click the Orange Button to order now

User questions & answers

Question: What do they mean by quick seal
Answer: THE WINDOW IS 7/8" IN FROM THE EDGE OF THE ENVELOPE. THE WINDOW IS 1 1/4" IN HIGHT X 4 1/2 WIDE
Question: Is the paper relatively smooth or textured. I need envelopes that can take a rubber stamp without getting bad bleed
Answer: Yes they do. I love these envelops for mass mailings.
Question: Do these have a plastic window, or just a cutout
Answer: These are not heat resistant. I ran 5 through my laser printer and 2 came through successfully but severely warped on the plastic window. The third had the window completely melt and leave part of the plastic in the printer causing a jam. These cannot be used in a laser printer.
Question: Has any one used these yet in a laser printer? I need to know for sure they can handle the heat
Answer: I had to look up laser print checks. The ones I found are 8.5" x 11" and have the check at the top and two printable areas beneath. I wouldn't recommend having the check visible through one of the envelope windows. It seems best to fold the sheet so that the check faces the back of the sheet and the address info is on the front and fits the envelope windows. I can offer only suggestions. I'm not an expert on this particular subject.

Product features

10 SINGLE WINDOW SECURITY ENVELOPES

Aimoh's #10 Single Window Security Envelopes are designed with an ultra secure security pattern, these envelopes are perfect for mailing invoices, statements and other standard business and legal documents, each envelope is designed with an extra large, easy read 4-1/2 X 1-1/8 poly window, positioned 7/8" from the left and 1/2" from the bottom of the envelope, perfect for displaying mailing addresses and eliminating constant hand addressing and printing for cheaper, quicker bulk mailing,

500 Number 10 Single Window Envelopes - Thick Gummed Seal - Designed for Secure Mailing of Quickbooks Checks, Invoices, Business Statements, Personal Letters - 4 1/8 x 9 1/2

Blue Summit Supplies

Based on 549 reviews Check latest price

Product description

Save Time and money Sending Business mail with our # 10 Single Window Security Envelopes

Quickly and easily send hundreds of business invoices, bill statements, and checks with our #10 envelope design and cost effective gummed seal.

  • Our gummed flap with thick adhesive make for quick and easy mass mailings.
  • Saves you money on bulk business mailing of business statements, invoices, or checks
  • Enough room for no 8 or no 9 return envelopes so you can get paid faster

Business mail will be completely secure during transit

It can be so difficult to find envelopes that create a strong lasting seal thus forcing you to waste time using glue sticks or tape to close the envelopes. Our Single Window envelopes with strong adhesives are designed to immediately create a strong seal so you do not have to worry about your contents being exposed to others.

Unlike weak sealing envelopes that allow your contents to fall out and become exposed, So much for a security envelope, Our strong seal will guarantee the safety of your contents.

> 24 LB White Wove Paper that creates a professional look and feel from out of the box all the way to your destination

100% Money Back Guarantee

We stand behind our products completely. We understand that sometimes buying physical products can be difficult if you cannot physically see what you are buying, however, if our product is not exactly what you are looking for, or does not meet your expectation then send them back anytime for a 100 % refund.

  • Perfect for mailing Invoices, QuickBooks Invoices and checks, billing statements, checks, and other business mail.
  • No need for tape or glue sticks as our strong gummed seal creates a hassle free and safe seal for all your sensitive documents.
  • Provides complete business mail security: your professional business mail will be completely hidden with our dark security tint design
  • Create professional looking mail with the added security of a single window envelope. Your business mail recipient address will show through the single window and you can quickly print your return address or add return address labels
  • Tamper proof design with our hot melt glue adhesive manufacturing process that allows the glue to penetrate the envelope, thus causing the envelope to tear if you open after sealing

User questions & answers

Question: is square flapped
Answer: no, they have Commercial Flap.
Question: What is the weight of the paper
Answer: 24 lb white wove paper
Question: Does the plastic window stand up to the envelope being put through a laser printer
Answer: I don't put it thru the printer since the mailing address shows thru the window. I just put a return address label on it before mailing.
Question: Is there plastic covering the window opening or is it just cut open
Answer: There is plastic covering the window.

500#10 Self Seal Security Single Window Envelopes-Designed for Business Statements, Computer printed Checks, QuickBooks Invoices - 4 1/8 X 9 1/2 - Made in the USA

Kiarmesh Supplies

Based on 34 reviews Check latest price

Product description

Perfectly Large Window: Ideal for Addresses and Bulk mailing

Ideal for bulk mailing, each envelope is designed with an extra large, easy read 4-1/2 X 1-1/8 poly window, positioned 7/8" from the left and 1/2 from the bottom of the envelope, perfect for displaying mailing addresses and eliminating constant hand addressing and printing for cheaper, quicker bulk mailing!

Security Tinted to Protect Sensitive details and data

Designed with an ultra secure security pattern, our envelopes are perfect as payroll envelopes and for mailing invoices, statements and other standard business and legal documents, creating a premium, secure pattern that easily obscures sensitive data and details!

Strong Quick Seal Adhesive

Are you having bad taste in your mouth from cheap glue envelopes? Are you wasting time using glue sticks or tape to close the envelopes? If so, our window envelopes self seal feature will help you. They are designed with premium strong quick seal adhesives across the envelope tab, creating a secure seal that won’t tear, perfect for securely mailing larger, thicker documents! You do not have to worry about your contents being exposed to others.

Professional Look with Quality

Thick 24 LB white wove paper that our envelopes are made of, provides a professional look to your business.

100% Money Back Guarantee

We stand behind our products completely. We understand that sometimes buying physical products can be difficult if you cannot physically see what you are buying, however, if our product is not exactly what you are looking for, or does not meet your expectation then send them back anytime for a 100 % refund.

  • PERFECT FOR Mailing Invoices, QuickBooks Invoices and checks, billing statements, checks, and other business mail
  • SECURITY TINT PATTERN: Mailing secure documents? Our #10 Security Envelopes are designed with a security wave pattern on the inside to protect contents, data and numbers from being easily read, unlike other cheap envelopes
  • SELF SEALING ENVELOPES for easy, quick, and strong seal: No water required, No bad tastes in your mouth. With our self seal window envelopes, peel strip and fold flap, then press for a quick, secure seal. Perfect for mailing larger, thicker documents
  • SAVE TIME: No need to slowly print or hand write the address. In our number 10 window envelopes, the large, easy read, poly window is positioned perfectly for displaying addresses or business information
  • PERFECT FOR BULK MAILING; Mail multiple pieces of business mail in our wide and large #10 Security Envelope Design. Stuff smaller #9 or #8 return envelopes to get your invoices paid quicker

User questions & answers

Question: Can these be used with a laser printer
Answer: I am not sure about these particular envelopes. I have bought window envelopes from a number of different companies. All of the ones that I have tried in laser printers melt. I would not count on using them in a laser printer unless they specifically claim to be compatible.
Question: Does it fit other envelope sizes inside
Answer: left edge 3/4 inch and bottom 1/2 inch

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