Top 10 Single Window Envelopes Self Seal – Business Mailing Envelopes

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1. Amazon Basics

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

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Amazon Basics #ad - Product dimensions: 4-1/8 x 9-1/2 inches. Includes 500 #10 envelopes made of 24-pound white woven paper for quality and strength. Peel-and-seal closure; no moisture needed. 10 business letter envelopes with single left address window. Interior security tint for privacy; securely send checks, invoices, or other confidential documents.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Part NumberAMZA26
ModelAMZA26

2. Aimoh

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500 Count 35210, Size 4-1/8 X 9-1/2 Inches, #10 Single Left Window Self-Seal Security Tinted Envelopes, 24 LB

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Aimoh #ad - 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, perfect for mailing larger, quick seal adhesive, thicker documents.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.

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. Easy read single window; perfect for bulk mailing, 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, easy read 4-1/2 X 1-1/8 poly-window, making slow printing and hand addressing a thing of the past.

Long lasting supply; ideal for everyday business use, each measuring 4-1/8 x 9-1/2 inches, each box provides 500 envelopes for a long lasting supply, perfect for invoices, statements and many more business uses! Click the Orange Button to order now.
BrandAimoh #ad
Part NumberFBA_35210
ModelFBA_35210

3. Blue Summit Supplies

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3 7/8 x 8 7/8, Return Mail, Thick Gummed Seal, Designed for Secure Mailing of Payroll Checks, QuickBooks Invoices, 500 #9 Single Window Security Envelopes, and Business Statements

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Blue Summit Supplies #ad - No need for tape or glue sticks as our strong gummed seal creates a hassle free and safe seal for all your sensitive documents. Perfect for mailing payroll checks, billing statements, QuickBooks invoices, confidential documents, and other business mail.

Your business mail recipient address will show through the single window and you can quickly print your return address or add return address labels. Create professional looking mail with the added security of a single window envelope. 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. Provides complete business mail security: your professional business mail will be completely hidden with our dark security tint design.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-025

4. Blue Summit Supplies

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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, Number 10 Size 4 1/8 X 9 1/2

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Blue Summit Supplies #ad - Perfect for mailing invoices, QuickBooks Invoices and checks, billing statements, checks, and other business mail. Just peel and seal for a strong lasting seal. Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design.

Provides complete business mail security: your professional business mail will be completely hidden with our dark security tint design. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. 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. Our security envelopes will quickly and easily create a strong seal for completely secure business mail.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-004
ModelBSS-92588-004

5. Office Deed

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Invoices, 4-1/8 x 9-1/2 Inches, Office Deed 500#10 Envelopes SELF SEAL Business Envelope Single Window Design, Statements & Legal Document, Security Tint Pattern for Secure Mailing

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Office Deed #ad - Quality: our security self seal envelopes made of 24-lb white wove. Our products will the perfect fit for all official purpose with high standard quality. Peel & seal closure: with the peel & seal closure, envelopes do not require licking to seal.

Privacy: protect confidential client information with our security tinted envelopes. The blue tint pattern makes impossible to see the details of the contents, even when held up to the light. Mail invoices, statements and other important documents with confidence. Wove finish adds a professional touch. The liner keeps the gum dust-free before use.

Simply press flaps together for a secure, strong seal.  . 500 envelopes in each box: our #10 4 1/8" x 9 1/2" envelopes ideal for any document from official business letters to business check. They come in boxes of 500, so you can stock up for long-term use.  . Single window:single window envelopes for easy printing, labeling or perfect for quick, mass business mailings.
BrandOffice Deed #ad
ManufacturerOffice Deed #ad
Weight5.73 Pounds
Part NumberSSESW

6. Blue Summit Supplies

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Blue Summit Supplies 500#10 Single Window Security Envelopes Flip and Seal, Number 10 Size 4 1/8” X 9 1/2”, 500 Pack, Designed for QuickBooks Invoices and Business Statements

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Blue Summit Supplies #ad - Our dark security tint design provides complete business mail security so your professional business mail will be completely hidden from view during transit. Perfect for mailing invoices, QuickBooks invoices, checks, billing statements, and other business mail.

Smaller #9 or #8 return envelopes will fit inside to get your invoices paid quicker. Save time with our easy to use flip and seal design; with no need for licking or moistening, our self sealing design allows for sending hundreds of invoices quickly and easily and is guaranteed to stay sealed with no need for tape or glue sticks.

Create professional looking mail with the added security of a single window envelope. Save time by quickly stuffing multiple pieces of business mail in our wide and large #10 security envelope 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.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-038
ModelBSS-92588-038

7. Blue Summit Supplies

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Designed for Secure Mailing of Invoices, Security Lining, 500 Ct, 4 1/8 x 9 1/2 Inches, Documents, and Business Statements, 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. Just fold down flap and press to create a strong lasting seal.

Maintain a professional look and feel throughout transit with our durable 24 lb white wove envelope paper. Create professional looking mail with the added security of a single window envelope. Our number 10 security envelope is perfect for mailing invoices, billing statements, and other business mail where the address is formatted on the right. 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, easy, our self sealing design is quick, and guaranteed to stay sealed.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-032

8. Spark Ink

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Plain Standard Size Business Check Envelopes 4-1/8 x 9-1/2 In, Self Stick Blank White Envelopes, Left Window Self-Seal Envelopes #10, 500 Count Security Window Envelopes No.10, 24lb Paper, Peel & Seal

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Spark Ink #ad - 500 count of environmentally friendly and super convenient security envelopes. Environmentally friendly: rest easy when you send a letter. Our business envelopes with security self-seal save you a ton of time with quick peel and seal action. These white no-lick self-seal envelopes are used by businesses to mail documents with sensitive materials.

Ditch the standard white letter size envelopes and replace them with our no 10 envelopes, Spark Ink spares no expense on thick, security self-seal design. Never get fooled again: unlike, regular plain white envelopes, these no. We’d say we are the best business envelopes #10 that self-seal on Amazon. Crafted with thick, 24lb paper that ensures utmost privacy. 10: we specifically designed these single left side window #10 envelopes with a dark navy, heavy coverage security tint to provide guaranteed privacy for your legal or business mail. Maximum strength self seal: unlike other strip and seal envelopes that need extra tape or glue, peel and seal adhesive that really sticks.

10 window envelopes tear when opened! Exclusive tamper evident slits provide increased security to prevent careful opening and resealing. Perfect for check printing or sensitive documents: windowless blank design allows for easy address printing or labels for mass mailing or to simply keep a bulk supply on hand for your home office. Heavyweight security left window envelopes no. Our legal size envelopes are manufactured from well managed forests and are fully recyclable.
BrandSpark Ink #ad
ManufacturerSpark Ink #ad
Part NumberSPI-SEE-ENV-WIN

9. Quality Park

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500 per Box 21418, Quality Park #10 Left Window Security Tinted Envelopes with a Self Seal Closure for Standard Business Mailings, 24 lb. White Wove, 4-1/8 x 9-1/2

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Quality Park #ad - The reflex blue pattern lining the envelope's interior makes it impossible to see the details of the contents, even when held up to the light. Positioned to fit most invoice address layouts, this left side window envelope not only saves time but also makes sure the document is delivered straight into the customer's hands! Enhanced privacy features: protect sensitive client information with these security tinted envelopes.

Display the receiver addresses through the window. Mail invoices, statements and other important documents with confidence. Single window envelope: instead of printing both the contents and the envelopes with an address, use the window to reveal pertinent information.

Simply raise the lower flap and press to seal. Redi-seal self adhesive closure: with the redi-seal closure, envelopes do not require moisture to seal. 500 envelopes in each box: ideal for both everyday office use and bulk mailings, each box of Quality Park #10 Left Window Security Tinted Envelopes provides a long lasting supply for your Standard Business Mailings! The unique double-flap design keeps the gum from sticking before use.
BrandQuality Park #ad
Manufacturer0 #ad
Height4.1 Inches
Length14.2 Inches
Weight6.09 Pounds
Width9.8 Inches
Part Number21418
Model21418

10. STAPLES

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Staples 511290 Self Seal Security Tinted #10 Envelope 4 1/8-Inch X 9 1/2-Inch White 500/Bx

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STAPLES #ad - These envelopes measure 4 1/8" x 9 1/2" in size, providing enough space for your mail. Made from 24 lbs. Self seal closure with wallet flap seals securely without moistening. Sold as 500/Box. White wove paper for durability. Envelopes are suitable for all your mailing needs.
BrandSTAPLES #ad
ManufacturerStaples #ad
Height9.5 Inches
Length0 Inches
Weight1.19 Pounds
Width4.13 Inches
Part Number511290/99297