Top 10 Self Sealing Envelopes with Windows – 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 - 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.

Provides complete business mail security: your invoices and statements will be completely hidden with our dark security tint 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. Maintains professional look and feel throughout transit with our durable 24 LB white wove envelope paper. Quickly and easily stuff our wide envelopes with several invoices or business statements.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight5.27 Pounds
Part NumberBSS-92588-007

2. Amazon Basics

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

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Amazon Basics #ad - 24-pound white woven paper for quality and strength. Measures 4-1/8 by 9-1/2 inches each. 500-pack of #10 security envelopes with peel & seal self-sealing closure—no moisture needed. Interior security tint keeps content private; single window allows address to show through. Ideal for home or office; securely send checks, invoices, or other confidential documents.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Part NumberAMZA26
ModelAMZA26

3. Aimoh

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

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Aimoh #ad - 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.

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. Easy read single window; perfect for bulk mailing, 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, extra large, each envelope has a premium, making slow printing and hand addressing a thing of the past.

Ultra strong quick seal; manufactured with ultra strong, creating a super strong seal across the width of the envelope for a strong seal that won’t easily tear, quick seal adhesive, perfect for mailing larger, thicker documents. 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.
BrandAimoh #ad
Part NumberFBA_35210
ModelFBA_35210

4. Blue Summit Supplies

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Number 10 Size 4 1/8 Inch X 9 ½ Inch, 500 No. 10 Self Seal Double Window Security Envelopes, Quickbooks Invoices, and Return Envelopes, Perfect Size for Multiple Business Statements

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Blue Summit Supplies #ad - Your return and sender address will line up perfectly. Perfect for mailing invoices, QuickBooks Invoices, billing statements, checks, and other business mail. Provides complete business mail security: your business mail will be completely hidden with our dark security tint design.

Just peel and seal for a strong lasting seal. Our security envelopes will quickly and easily create a strong seal for completely secure business mail. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. No need to spend time and money stamping, adding return labels, or spending extra money on custom envelopes, just quickly slide in your business mail to create professional looking business mail. Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Height4.4 Inches
Length11.9 Inches
Width10.1 Inches
Part NumberBSS-92588-003
Model74689

5. Aimoh

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For Business Checks, Size 3 5/8 x 8 11/16 Inches, 500 Count30180, QuickBooks & Quicken Checks, 500#8 Double Window Self Seal Security Envelopes, Not for Invoices, Checks Fit Perfectly

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Aimoh #ad - 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.

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. Five hundred count: each box contains a long lasting Five Hundred envelope supply, ideal for business and home office use.

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. Premium security tint check envelopes: Ultra Secure security tint pattern - Double Window Security Tinted Check Envelopes.
BrandAimoh #ad
ManufacturerAimoh #ad
Part Number30180

6. Aimoh

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

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Aimoh #ad - Double windows; professional, easily read double front windows suitable for standard business and legal mailings, eliminating constantly printing and hand writing addresses, each envelope contains two front windows, 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.

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.99 double window quick seal security envelopes; tired of cheap thin, easily torn envelopes? Aimoh's#9 Security Envelopes are the perfect solution, extra large, with premium security tint, easily read dual front windows and super secure quick seal adhesive.

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. Quick seal adhesive; aimoh's #9 envelopes use ultra secure, super secure seal across each envelope’s width that won’t easily open or tear as with cheaper gummed seals, quick seal adhesive to create a full, perfect for larger and thicker documents.
BrandAimoh #ad
ManufacturerAimoh #ad
Height4.1 Inches
Length11.5 Inches
Weight0.01 Pounds
Width9.2 Inches
Part NumberFBA_30139
Model30139

7. Prime Business Checks

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For Business Laser Checks, Ultra Security Tinted, Self Adhesive Peel & Seal White, Size 3 5/8 x 8 11/16-24lb NOT for INVOICES, 500 Self Seal QuickBooks Double Window Security Check Envelopes

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Prime Business Checks #ad - Designed to fit Computer business checks, QuickBooks checks. Peel strip and fold flap, then press for a quick, secure seal. Self seal double Window, Security tinted for added privacy and confidentiality. Envelope is ideal for all business, professional and personal correspondence. Peel & seal flap: no water required. Premium 24 lb - color: white - Finish: Smooth/Wove.
BrandPrime Business Checks #ad
ManufacturerPrime Business Checks #ad
Height12 Inches
Length8.69 Inches
Weight4.8 Pounds
Width3.62 Inches
Part NumberPB-92663-500
ModelPB-92663-500

8. Blue Summit Supplies

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Number 10 Size 4 1/8 X 9 1/2, Computer Printed Checks with Strong Peel and Seal Flap, 500 No. 10 Self Seal Single Window Security Envelopes -Designed for QuickBooks Invoices and Business Statements

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Blue Summit Supplies #ad - You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. Provides complete business mail security: your professional business mail will be completely hidden with our dark security tint design.

Your business mail recipient address will show through the single window and you can quickly print your return address or add return address labels. Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design. Create professional looking mail with the added security of a single window envelope. Our security envelopes will quickly and easily create a strong seal for completely secure business mail. Perfect for mailing invoices, billing statements, checks, QuickBooks Invoices and checks, and other business mail. Just peel and seal for a strong lasting seal.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight6.54 Pounds
Part NumberBSS-92588-004
ModelBSS-92588-004

9. ACSTEP

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Acko #10 500Pack Double Window Envelopes Quickly Self-Seal Envelopes 4 1/8 x 9 1/2,Security Tint Pattern Designed for Home Office Secure Mailing,Letters and Invoices, White Envelopes 500 Count

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ACSTEP #ad - Best security envelopes: #10 double window envelope size 4 1/8 x 9 1/2 designed for home office secure mailing, letters and Invoices, computer business checks perfectly. Quickly sealing closure: 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.

Security tinted design and strong self-seal for the best security envelopes on the market. Standard package: the envelopes are 500pcs per box, checks, and invoices every day, which can protect the item intact during the delivery. If you need to send statements, packaged by a solid carton box, this security envelope window fits for you! Buy with confidence! Click the Orange Button to order now! Ideal for mass mailing of business documents. Privacy and confidentiality are critical for all business and legal transactions, so these security envelopes are meet your standards.

You can use business mailing envelopes for sending invoices and checks. Dual windows are placed in an ideal location for checks. It's the perfect choice for small businesses, and everyday use, home offices, #10 Security Envelopes are provided in a 500-envelope pack. Double window envelopes: it's easily read dual windows for everyday business mailings and postal addresses. Premium security tinted pattern: #10 envelopes are designed with premium security printed design to protect contents and sensitive information, as well as your customer's.
BrandACSTEP #ad
ManufacturerAcko #ad
Part NumberAcko - 00065
ModelBrown Cheque size envelop

10. Blue Summit Supplies

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Security Lining, Designed for Secure Mailing of Invoices, Documents, and Business Statements, 4 1/8 x 9 1/2 Inches, 500 Ct, 500 Self Seal Number 10 Single Right Window Envelopes

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Blue Summit Supplies #ad - Provides complete business mail security; your professional business mail will be completely hidden with our dark security tint design. Your business mail recipient address will show through the single right window, with your return address label added to the top left corner.

With no more headaches or bad tastes in your mouth from licking envelopes, our self sealing design is quick, easy, and guaranteed to stay sealed. Maintain a professional look and feel throughout transit with our durable 24 lb white wove envelope paper. Just fold down flap and press to create a strong lasting seal. Our number 10 security envelope is perfect for mailing invoices, billing statements, and other business mail where the address is formatted on the right. Create professional looking mail with the added security of a single window envelope.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-032