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Brown kraft 28 lb stock: perfect for everyday home and business use, Quality Park's clasp envelopes are constructed from heavyweight 28 lb. Gummed flap: in addition to the clasp closure, these quality park envelopes have a moisture activated secure seal with deep Gumming on the flap to create a permanent seal.
Packed in 100 count: so many uses means supply is depleted quickly! Conveniently packed in 100 count to reduce frequency of purchasing. Great for home, interoffice or mailing.


Less yuck: we promise you won't miss licking envelopes or crumbly, drippy sponges; complete your mailings, no accessories required. Enhanced security: offer the protection clients deserve; a security tint makes envelopes hard to see through; a security pattern scrambles the appearance of text.

Quick-seal closure; our #10 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 for any letter sized and larger documents without splitting.
Laser and inkjet printer compatible; premium construction measuring 4-1/8 x 9-1/2 inches, fully compatible with most inkjet and laser printers for quick and easy addressing! Click the Orange Button to order now. 100 envelope pack; these envelopes are manufactured with a window-less front panel for the perfect choice for small businesses, home offices and everyday use, #10 Security Envelopes are provided in a 100-envelope pack.





1. Quality Park
#ad
100 per Box 37890, Great for Filing, Storing or Mailing Documents, Quality Park 9 x 12 Clasp Envelopes with Deeply Gummed Flaps, 28 lb Brown Kraft
#adQuality Park #ad - Reusable clasp: designed for repeated use, office, school, double prong metal clasp is durable and eyelets are reinforced . Brown kraft stock designed to give contents extra protection during mailing, storage and handling.Brown kraft 28 lb stock: perfect for everyday home and business use, Quality Park's clasp envelopes are constructed from heavyweight 28 lb. Gummed flap: in addition to the clasp closure, these quality park envelopes have a moisture activated secure seal with deep Gumming on the flap to create a permanent seal.
More information #ad
The flaps close with full flap gum to endure humid climates to ensure the envelope stays sealed so your contents don't fall out! 9 x 12 size: perfect size for mailing and storing 8-1/2 x 11 sized documents flat when folding is undesirable. Packed in 100 count: so many uses means supply is depleted quickly! Conveniently packed in 100 count to reduce frequency of purchasing. Great for home, interoffice or mailing.
Brand | Quality Park #ad |
Manufacturer | Quality Park #ad |
Height | 3.75 Inches |
Length | 14 Inches |
Weight | 4 Pounds |
Width | 9.1 Inches |
Part Number | QUA37890 |
Model | 37890 |
Warranty | NA |
More information #ad
2. Mead
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Mead #10 Envelopes, Security, White, 45 Per Box 75026, 4-1/8" X 9-1/2", Press-it Seal-it
#adMead #ad - Mead press it seal it #10 security envelopes; 45 envelopes per box. Size: 4 to 1/8 inches x 9 to 1/2 inches. White envelopes with self adhesive seal; Security lining for privacy.More information #ad
Brand | Mead #ad |
Manufacturer | MEAAH #ad |
Height | 4.3 Inches |
Length | 9.7 Inches |
Weight | 0.02 Pounds |
Width | 1.5 Inches |
Part Number | 75026 |
Model | 75026 |
Warranty | kkk |
More information #ad
3. Quality Park
#ad
Redi-Strip Closure, 24-lb White Wove, Quality Park #10 Self-Seal Security Envelopes, 100/Box QUA69117, 4-1/8" x 9-1/2", Security Tint and Pattern
#adQuality Park #ad - Save time with self-stick: quality park #10 Security Envelopes have a strong peel & stick closure that helps you fly through mailings in record time.Less yuck: we promise you won't miss licking envelopes or crumbly, drippy sponges; complete your mailings, no accessories required. Enhanced security: offer the protection clients deserve; a security tint makes envelopes hard to see through; a security pattern scrambles the appearance of text.
More information #ad
An excellent value: bright white 24-lb paper makes an impression for business mailings and personal correspondence; get 100 4-1/8 x 9-1/2 inch envelopes. Store more, longer: reid-strip envelopes have a longer shelf-life thanks to the peel able strip that protects your adhesive from dust.Brand | Quality Park #ad |
Manufacturer | Quality Park #ad |
Height | 2.03 Inches |
Length | 9.63 Inches |
Weight | 0.91 Pounds |
Width | 4.25 Inches |
Part Number | QUA69117 |
Model | QUA69117 |
Warranty | N/A |
More information #ad
4. Aimoh
#ad
EnveGuard, 100 Count 34100, #10 Security Tinted Self-Seal Envelopes, Size 4-1/8 X 9-1/2 Inches, White, 24 LB, No Window
#adAimoh #ad - Enveguard technology; in today's world where our health, the team of engineers and developers at Aimoh have researched and developed the EnveGuard Technology and Approval systems, at Aimoh we approve only the highest quality products, privacy and security is so much threatened, produced from the best and safest material on earth.Quick-seal closure; our #10 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 for any letter sized and larger documents without splitting.
More information #ad
Super security tint pattern; #10 envelopes designed with a secure, security tint-pattern to protect contents and sensitive information, perfect for ultra-secure mailing. Laser and inkjet printer compatible; premium construction measuring 4-1/8 x 9-1/2 inches, fully compatible with most inkjet and laser printers for quick and easy addressing! Click the Orange Button to order now. 100 envelope pack; these envelopes are manufactured with a window-less front panel for the perfect choice for small businesses, home offices and everyday use, #10 Security Envelopes are provided in a 100-envelope pack.
Brand | Aimoh #ad |
Manufacturer | Aimoh #ad |
Height | 2.2 Inches |
Length | 9.7 Inches |
Weight | 1.4 Pounds |
Width | 4.3 Inches |
Part Number | 34100 |
Model | 34100 |
More information #ad
5. AmazonBasics
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Peel & Seal, 9x12 Inch, AmazonBasics Catalog Mailing Envelopes, White, 100-Pack, AMZP15
#adAmazonBasics #ad - 100-pack of #10-1/2 catalog envelopes. Ideal for mailing catalogs, brochures, booklets, and multi-page documents. Durable 28-pound white woven paper for quality and strength. Measures 9 by 12 inches each. Easy-to-seal peel & Seal closure—no moisture needed.More information #ad
Brand | AmazonBasics #ad |
Manufacturer | AmazonBasics #ad |
Part Number | AMZP15 |
Model | AMZP15 |
Warranty | N/A |
More information #ad
6. AmazonBasics
#ad
AmazonBasics #10 Security-Tinted Envelopes with Peel & Seal, White, 500-Pack, AMZP5
#adAmazonBasics #ad - Interior security tint keeps content private. Ideal for home or office; securely send checks, invoices, or other confidential documents.More information #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 closure—no moisture needed.Brand | AmazonBasics #ad |
Manufacturer | AmazonBasics #ad |
Part Number | AMZP5 |
Model | AMZP5 |
Warranty | N/A |
More information #ad
7. Splendoress
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Self Stick Bulk Envelops, #10 White Letter Businesses Envelopes -500 Peel and Seal Tinted Windowless # 10 Envelope, Printer Friendly, 500 Self Seal Security Mailing Envelopes
#adSplendoress #ad - High quality & bulk pricing - 24lbs high quality envelopes at a fraction of the price. Windowless envelope. Long lasting supply - 500 count per box. Self seal envelope- just peel and stick 4 1/8 in.More information #ad
Can't see through envelopes - Security printing pattern on the inside prevents from seeing what inside. X 9 1/2 in size envelop. No need to lick the flap anymore - Very convenient.Brand | Splendoress #ad |
Manufacturer | Splendoress #ad |
Height | 0.01 Inches |
Length | 9.5 Inches |
Weight | 6.06 Pounds |
Width | 4.12 Inches |
Part Number | #10 Security Envelopes Windowless |
More information #ad
8. AmazonBasics
#ad
4 1/8-Inch x 9.5-Inch, 500 Pack, AmazonBasics #10 Security Tinted Business Envelopes
#adAmazonBasics #ad - Measure 4-1/8 by 9-1/2 inches each. Security tinted for added privacy; V-flap design. Made of premium 24-pound white wove paper. 500 executive-style envelopes for business or personal use.More information #ad
Brand | AmazonBasics #ad |
Manufacturer | AmazonBasics #ad |
Height | 0.01 Inches |
Length | 9.5 Inches |
Weight | 0.1 Pounds |
Width | 4.13 Inches |
Part Number | AMZSEC10 |
Model | AMZSEC10 |
More information #ad
9. Mead
#ad
Mead 9X12 Clasp Envelopes, Office Pack 20 Count 76020
#adMead #ad - Legal size. Clasp envelopes. Clasp. 20 per package. Heavyweight. 20 per package. Clasp envelopes. Legal size, clasp. Heavyweight envelopes.More information #ad
Brand | Mead #ad |
Manufacturer | MEAAH #ad |
Height | 14.45 Inches |
Length | 0.88 Inches |
Weight | 0.65 Pounds |
Width | 9 Inches |
Part Number | 76020 |
Model | 76020 |
Warranty | kkk |
More information #ad