Top 10 Envelopes SELF SEAL #9 – Business Mailing Envelopes

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1. Blue Summit Supplies

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500 No. 9 Flip and Seal Double Window Security Envelopes, Designed for Quickbooks Invoices and Business Statements with Self Seal Flip Press and Seal Flap -Number 9 Size 3 7/8 Inch X 8 7/8 Inch

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Blue Summit Supplies #ad - Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint design. Quickly and easily stuff our wide envelopes with several invoices or business statements.

Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper. Perfectly fits quickbooks invoices and business statements: sender and return address will be visible on your QuickBooks invoices and monthly bills through our unique double window design. Save time with easy to use flip and seal self-seal design; With no need for licking or moistening, our self seal design allows for sending hundreds of invoices quickly and easily and is guaranteed to stay sealed with no need for tape or glue sticks.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight5.27 Pounds
Part NumberBSS-92588-007

2. Amazon Basics

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

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Amazon Basics #ad - Interior security tint keeps content private; securely send checks, invoices, or other confidential documents. Measures 3-7/8 by 8-7/8 inches each. Double window allows sender and recipient addresses to show through. 24-pound white wove paper for quality and strength; ideal for home or office. 500-count pack of #9 security envelopes with Peel & Seal closure—no moisture needed.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Height8.8 Inches
Length1 Inches
Weight5.96 Pounds
Width3.88 Inches
Part Numberamz43
ModelAMZ43

3. Aimoh

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For Invoices, Security Tinted, 500#9 Double Window SELF Seal Security Envelopes, Size 3-7/8 x 8-7/8-24 LB, 500 Count 30139, Statements & Documents

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Aimoh #ad - Security tint; forget thin, easily read envelopes these premium #9 Security Envelopes are designed with security tinted wave patterns which easily obscure details, numbers and other data within, perfect for mailing business statements and invoices while protecting sensitive information. Quick seal adhesive; aimoh's #9 envelopes use ultra secure, quick seal adhesive to create a full, super secure seal across each envelope’s width that won’t easily open or tear as with cheaper gummed seals, perfect for larger and thicker documents.

Double windows; professional, each envelope contains two front windows, easily read double front windows suitable for standard business and legal mailings, eliminating constantly printing and hand writing addresses, advertising campaigns and many more, a 1-3/16" X 3-1/2" top window positioned 3/8" from the left and 2" from the bottom and the bottom 1" X 4" window is 3/8" from the left and 1/2" from the bottom.

Long lasting supply; ideal for everyday business use and professional mass mailings, each box of these premium #9 Security Envelopes provide a super long lasting 500 envelope supply, for the best value on the market! Click the Orange Button to order now. 9 double window quick seal security envelopes; tired of cheap thin, extra large, easily torn envelopes? Aimoh's#9 Security Envelopes are the perfect solution, with premium security tint, easily read dual front windows and super secure quick seal adhesive.
BrandAimoh #ad
ManufacturerAimoh #ad
Height4.1 Inches
Length11.5 Inches
Weight0.01 Pounds
Width9.2 Inches
Part NumberFBA_30139
Model30139

4. GSM Brands

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For Quickbooks Business Invoices 3 7/8" x 8 7/8", Self Seal Double Window Security Envelopes #9, Box of 500

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GSM Brands #ad - If these envelopes fail to live up to your expectations, simply return them for a full refund. The double widows are built to display the sender and receiver addresses of standard invoice configurations. This will give you peace of mind to know that your invoices are only viewed by the intended recipient.

Save money, and energy by stocking up with the 500 count box. Designed for quickbooks printed business invoices - Save time and energy with our self seal double window envelopes specifically designed for use with most printed Quickbooks business invoice layouts. Simply insert the invoice, peal away the protective strip, and press the envelope flap down firmly for a strong adhesive hold. Money back guarantee - we are confident that you will have a great experience with these self seal double window envelopes.

Easy adhesive self seal - our peel and seal envelopes do not require moisture to activate the adhesive. Security pattern protects your information - the woven blue security pattern prevents the contents from being seen through the 26 lb white paper envelope. Box of 500 drives value - our #9 envelopes come in a box of 500, time, and are perfect for bulk mailings or general office supply.
BrandGSM Brands #ad
ManufacturerGSM Brands #ad
Part Number#9 Envelope

5. EnDoc

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Strong Peel and Seal, EnDoc #9 Self Seal Security Tinted Envelope, 500 Pack, Windowless, Security tinted Pattern, 3 7/8x8 7/8 Inch White Business Envelope

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EnDoc #ad - They are perfect for keeping confidential documents like business and legal documents safe from unauthorized prying eyes till they reach the desired destination. All you need to do is remove the seal’s fold-over flap and stick the lip. The pack of 500 also gives you better value for your money, documents, invoices, checks, making them ideal envelopes for both home and office use.

Printer-friendly design: the windowless design of our security tint envelopes not only makes them more secure but also provides a printable surface on the front panel for easier print labeling or hand addressing. This is a more convenient and more secure option compared to conventional adhesive strip. Premium quality envelopes: unlike similar business envelopes that are light and flimsy, and more durable, stronger, from 24Lb white paper that is thicker, our self-seal envelopes are made in the USA, offering better resistance to rough handling in the mailing process and better security for your letters and documents.

This makes them perfect for mass envelope printing when doing multiple business mail or quick hand addressing for home use. Perfect for business use: our neutral white business envelopes # 9 3 7/8 x 8 7/8 are convenient for all-round use and perfectly fit standard 8. 5’’ x 11’’” letters, fits great when inserted in the #10 Standard Envelopes return envelopes and more. Ideal for sensitive documents: these letter sized envelopes come with premium security tinted patterns for extra protection for sensitive information.
BrandEnDoc #ad
ManufacturerBusiness Envelopes #ad
Part NumberBUS357
ModelBUS357

6. Aimoh

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24 LB, No Window, 500 Count 30138, 500 #9 Security Self-Seal Envelopes, EnveGuard, Premium Security Tint Pattern, Ultra Strong Quick-Seal Closure, Size 3-7/8 x 8-7/8 Inches, White

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Aimoh #ad - Long lasting supply; ideal for everyday business use and professional mass mailings, each box of these premium #9 Security Envelopes provide a super long lasting 500 envelope supply, for the best value on the market! Windowless design; envelopes ideal for standard business & legal documents and sensitive correspondence, manufactured with a windowless front panel for easy printing, labeling or hand-addressing, perfect for quick, mass business mailings.

Premium security tinted pattern; our #9 envelopes are designed with a premium security printed design to protect contents and sensitive information, perfect for secure business and legal mailing while protecting sensitive information. Quick-seal closure; our #9 envelopes are designed with an ultra strong SELF-SEAL adhesive strip to create a full, super secure seal across each envelope's width that won't easily open or tear, ideal for mailing larger documents without splitting.

9 security tinted self seal envelopes; forget cheap envelopes that easily split and aren't suitable for secure mailing, our #9 envelopes are designed with a premium security tint to protect sensitive information and a super strong SELF-SEAL strip, perfect for documents and invoices.
BrandAimoh #ad
ManufacturerAimoh #ad
Part Number30138
Model30138

7. Blue Summit Supplies

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Pack of 500, Number 9 Size 3 7/8 Inch X 8 7/8, 500 No. 9 Self Seal Security Envelopes – Peel and Seal Designed for Secure Mailing, Security Tinted with Printer Friendly Design

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Blue Summit Supplies #ad - Perfect for secure everyday home and business mailing. Easily print hundreds of envelopes with our low profile envelope design. No need to worry about others seeing your documents, our dark black security tint completely hides your mail.

These envelopes are designed for both laser and inkjet printers. Provides complete mail security. Easily fits invoices, checks, letters, and more. Our self seal design is quick and easy and is guaranteed to stay sealed with no need for tape or glue sticks. Just peel and seal to create a strong lasting seal without licking or moistening.

Maintains professional look and feel throughout transit with our durable 24 lb white wove envelope paper. Our printer friendly envelopes with smooth thick paper saves you time and frustration while printing without having to worry about jamming. Our security #9 windowless envelopes perfectly fit standard 8. 5’’ x 11’’ paper sizes and other large documents.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-034

8. Amazon Basics

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500-Pack, Amazon Basics #9 Envelopes with Gummed Seal, White

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Amazon Basics #ad - Moisture-activated gummed closure ensures a secure seal. Large supply for long-lasting convenience—perfect for frequent mailings or bulk mailing projects. Measures 3-7/8 by 8-7/8 inches each; backed by an Amazon Basics 1-year limited warranty. 24-pound white wove paper provides quality and strength. 500-count pack of #9 envelopes for personal or professional use.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Height9 Inches
Length12 Inches
Weight5.96 Pounds
Width3.88 Inches
Part Numberamz40
ModelAMZ40

9. ValBox

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ValBox 500 Count #9 Self Seal Security Envelopes 3-7/8x8-7/8" Double Window Envelopes for QuickBooks Invoices, Business Statements and Legal Documents

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ValBox #ad - We are confident you would love our valBox invoice envelope in its quality and price. Premium quality: these #9 double window envelopes feature with durable 24lbs white wove paper, peel-off strip, stronger glue and security tint design. Great self seal envelopes.

You don't need to stand licking envelopes and using glue or the water activators, which is time consuming and messy. Security invoice envelopes: forget the thin, try our valbox #9 double window security envelopes, torn easily and see-through envelopes you used in the past, which fit QuickBooks invoices and business billing statements perfectly!!! The contents are also easy to slip in. Double windows design: the windows line up perfectly with return and sender address, eliminating the need for hand addressing or printing mailing labels, ideal for legal and standard business mailings, advertising campaigns and more.

Protect your invoice and statement privacy and safety. The detail position for the double windows, please refer the size chart on the second photos. The self-seal feature makes these envelopes with windows much more convenient than regular, moisten-and-seal ones. However, if there's anything make you unhappy or unsatisfied, please do contact us without any hesitation.
BrandValBox #ad
ManufacturerValBox #ad
Part NumberVB051

10. Office Elite

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3 7/8" x 8 7/8", 24 LB, Peel & Seal, Designed for QuickBooks Invoices, and Legal Documents, Business Correspondence, #9 Double Window SELF SEAL Security Envelopes, 550 Per Box, Security Tinted

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Office Elite #ad - Ideal for invoices: designed specifically for invoices and legal documents—perfect invoice envelopes for QuickBooks invoices and statements as well as other computer-generated invoices; dual windows placed in an ideal location for invoice address information.

Premium quality: our window envelopes feature a high-quality security pattern, premium 24 lb. Paper, and a superior adhesive seal. Best value: each box comes with 550 envelopes, data, not the standard 500—50 bonus double window envelopes included with each order! Easy to use: a speed seal flap and ultra-strong adhesive make mailing easy—simply peel the strip away and press the flap down for a permanent seal that won’t rip open or tear while in transit! Maximum protection: our high-quality security pattern and heavy paper stock protect your numbers, and correspondence—mail your checks and advertisements with confidence knowing that your sensitive information will remain private.

BrandOffice Elite #ad
ManufacturerVesta Home Supply #ad
Height4.3 Inches
Length11.5 Inches
Weight0.01 Pounds
Width10.5 Inches
Part NumberB-13A
ModelB-103A