Top 10 Left Window Envelopes – Business Mailing Envelopes

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1. AmazonBasics

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

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AmazonBasics #ad - Measures 4-1/8 by 9-1/2 inches each. 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. 500-pack of #10 security envelopes with Peel & Seal closure—no moisture needed. 24-pound white woven paper for quality and strength.
BrandAmazonBasics #ad
ManufacturerAmazonBasics #ad
Part NumberAMZA26
ModelAMZA26

2. Aimoh

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

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Aimoh #ad - Easy read single window; perfect for bulk mailing, positioned 7/8" from the left and 1/2" from the bottom of the envelope, extra large, perfect for displaying addresses or business information, 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 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. 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.

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. 10 single window security envelopes; forget cheap, our #10 Security Envelopes are premium quality, thin envelopes that allow contents to be easily read, ultra secure envelopes suitable for everyday business and legal mailing while protecting sensitive contents and information.
BrandAimoh #ad
Part NumberFBA_35210
ModelFBA_35210

3. Blue Summit Supplies

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

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Blue Summit Supplies #ad - Perfect for mailing invoices, billing statements, QuickBooks Invoices and checks, checks, and other business mail. 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.

No need for tape or glue sticks as our strong gummed seal creates a hassle free and safe seal for all your sensitive documents. Your business mail recipient address will show through the single window and you can quickly print your return address or add return address labels. 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.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight6.15 Pounds
Part NumberBSS-92588-011

4. 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 - 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.

You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker. Perfect for mailing invoices, QuickBooks Invoices and checks, checks, billing statements, and other business mail. Save time 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. Our security envelopes will quickly and easily create a strong seal for completely secure business mail. Just peel and seal for a strong lasting seal.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-004

5. AmazonBasics

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White, Left Window, AmazonBasics #10 Business Envelopes with Gummed Seal, 500-Pack

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AmazonBasics #ad - Measures 4-1/8 by 9-1/2 inches each. Large supply for long-lasting convenience—perfect for frequent mailings or bulk mailing projects. 24-pound white woven paper provides quality and strength. Moisture-activated gummed closure ensures a secure seal. 500-count of #10 envelopes with left-sided address window.
BrandAmazonBasics #ad
ManufacturerAmazonBasics #ad
Part NumberAMZA20
ModelAMZA20

6. Aimoh

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Gummed Closure, Size 4-1/8 X 9-1/2 Inches, #10 Single Left Window Envelopes, 24 LB, 500 Count 35410

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Aimoh #ad - 500 envelopes supply; ideal for everyday business use, perfect for invoices, each measuring 4-1/8 x 9-1/2 inches, each box provides 500 envelopes for a long-lasting supply, statements and many more business uses!.

Easy read single window; perfect for quick 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, each envelope has a premium, extra-large, making slow printing and hand addressing a thing of the past.224 lb white wove paper that creates a professional look and feel from out of the box all the way to your destination. Perfect for mailing invoices, billing statements, QuickBooks Invoices and checks, checks, and other business mail.10 left window envelopes; premium quality, suitable for everyday business and legal mailing.
BrandAimoh #ad
ManufacturerAimoh #ad
Part Number35410

7. CASHIER DEPOT YOUR ONE STOP SHOP FOR ALL CASHIER'S NEEDS

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Security-Tinted, 100 Envelopes Left Window, 24lb. White Paper, 100 Cashier Depot #10 Business Envelope, Peel & Seal

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CASHIER DEPOT YOUR ONE STOP SHOP FOR ALL CASHIER'S NEEDS #ad - Heavy 24lb White Paper. Standard 1-1/8" x 4-1/2" window positioned 7/8" from left and 1/2" from bottom. 100 envelopes Security Tinted. Peel & seal # 10 envelope 4 1/8 X 9 1/2. Made in USA.
BrandCASHIER DEPOT YOUR ONE STOP SHOP FOR ALL CASHIER'S NEEDS #ad
ManufacturerCashier Depot #ad
Part NumberBE10

8. Quality Park

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

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Quality Park #ad - Mail invoices, statements and other important documents with confidence. 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 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.

Single window envelope: instead of printing both the contents and the envelopes with an address, use the window to reveal pertinent information. Display the receiver addresses through the window. The unique double-flap design keeps the gum from sticking before use.

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. 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.
BrandQuality Park #ad
Manufacturer0 #ad
Height4.1 Inches
Length14.2 Inches
Weight6.09 Pounds
Width9.8 Inches
Part Number21418
Model21418

9. Blue Summit Supplies

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3 7/8 x 8 7/8, 500 No. 9 Single Window Security Envelopes, Thick Gummed Seal, Return Mail, Designed for Secure Mailing of Payroll Checks, QuickBooks Invoices, and Business Statements

#ad
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. 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.

Your business mail recipient address will show through the single window and you can quickly print your return address or add return address labels. Perfect for mailing payroll checks, QuickBooks invoices, confidential documents, billing statements, and other business mail. 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.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Part NumberBSS-92588-025

10. Blue Summit Supplies

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

#ad
Blue Summit Supplies #ad - Your contents will stay sealed during transit with your strong gummed adhesive and unique 1’’ tapered gummed flap design. Save time quickly stuffing multiple pieces of business mail in our wide and large #10 Security Envelope Design.

Perfect for mailing invoices, checks, QuickBooks Invoices and checks, billing statements, and other business mail. 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. No need for tape or glue sticks as our strong gummed seal creates a hassle free and safe seal for all your sensitive documents. You can even stuff smaller #9 or #8 return envelopes to get your invoices paid quicker.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight6.02 Pounds
Part NumberFBA_BSS-92588-011
ModelFBA_BSS-92588-011