Top 10 Letter Envelopes 9×12 – Clasp Mailing Envelopes

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1. Quality Park


Kraft, #90-9" Width x 12" Length, Kraft, Quality Park Gummed Kraft Clasp Envelopes, 28 lb, 100 / Box, Gummed, Clasp

Quality Park #ad - Rugged envelopes feature a reinforced clasp design plus deep gumming on flaps for a secure seal. Envelopes are made of sturdy, 28 lb Kraft Stock.
BrandQuality Park #ad
ManufacturerQuality Park #ad
Height3.75 Inches
Length14 Inches
Weight4 Pounds
Width9.1 Inches
Part NumberQUA37890

2. Amazon Basics


Amazon Basics Catalog Mailing Envelopes, Peel & Seal, 100-Pack, White, 9x12 Inch

Amazon Basics #ad - Measures 9 by 12 inches each. Easy-to-seal peel and Seal closure—no moisture needed. Ideal for mailing catalogs, booklets, brochures, and multi-page documents. Durable 28-pound white woven paper for quality and strength. 100-pack of no. 10-1/2 catalog envelopes.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Part NumberAMZP15

3. Aimoh


28lb, Security Tinted, Ultra Strong Quick-Seal, 9 x 12 inch 38100, 100 9 x 12 SELF Seal Security White Catalog Envelopes

Aimoh #ad - 100 9 x 12 catalog envelopes in every pack for a long lasting supply, easy bulk mailing and everyday business correspondence! Security tint pattern; ideal for secure business mailing and sensitive correspondence, each 9x12 envelope contains a super secure, security tint pattern to protect contents, information and data when mailing.

9x12 catalog envelopes; aimoh’s white 9x12 security envelopes combine a professional security tint pattern, large size for business documents and premium quality for the best 9x12 envelopes on the market. White 28lb stock; perfect for everyday business use, super secure seal across each envelope's width that won't easily open or tear and use high quality, Aimoh’s 9x12 envelopes are designed with an ultra strong SELF-SEAL adhesive strip to create a full, white 28lb stock for a professional finish.

For 8. 5x11 documents; large 9x12 size and strong quick-seal closure security tinted envelopes, perfect for photos, catalogs, thicker, larger documents and other business mailings.
BrandAimoh #ad
ManufacturerAimoh #ad
Height2.5 Inches
Length9 Inches
Weight4.06 Pounds
Width12 Inches
Part NumberFBA_38100

4. Aimoh


28lb, 9 X 12 Self-Seal Brown Kraft Catalog Mailing Envelopes, 100 Count, 9x12 Inch 38300

Aimoh #ad - 9x12 kraft envelopes; aimoh’s catalog envelopes combine tough 28lb golden kraft paper stock, strong self-sealing SELF-SEAL Closure for the best catalog envelopes on the market, perfect for large documents and all business correspondence. Self adhesive seal; aimoh's 9 x 12 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 thicker catalogues, brochures and magazines.

28lb stock; manufactured from tough, the durable, standing up to normal postal wear and tear without damage, the brown kraft material will insure privacy of the envelopes contents, durable Construction like 28lb paper stock, woven paper extends the tampering resistance of this envelope, .

Durable multi-purpose; ideal for mailing catalogues, magazines, documents, promotional material, direct mail, brochures and more, Aimoh’s Catalog Envelopes can be easily hand addressed or customized with business information.9x12 self-seal kraft envelopes; ideal for everyday business use and professional mailings, each box of our premium 9x12 mailing envelopes with the peel and seal closure provide great value 100 envelope supply, for the best value on the market! .
BrandAimoh #ad
ManufacturerAimoh #ad
Weight3.9 Pounds
Part Number38300

5. Amazon Basics


Amazon Basics 9 x 12-Inch Clasp Kraft Envelopes, 100-Pack, Gummed

Amazon Basics #ad - Clasp envelope 100-pack for filing, storing, or mailing documents. Double-prong metal clasp closure and reinforced eyelet keep documents securely contained. Measures 9 by 12 inches each; backed by an Amazon Basics 1-year limited warranty. Moisture-activated gummed surface on flap creates a permanent seal. Made with thick 28-pound kraft paper for reliable strength and protection.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Height3.13 Inches
Length12 Inches
Weight1.76 Pounds
Width9 Inches
Part NumberAMZ37890

6. Amazon Basics


100-Pack, AMZP13, Peel & Seal, Amazon Basics Catalog Mailing Envelopes, Brown Kraft, 9x12 Inch

Amazon Basics #ad - 100-pack of 9 x 12 inch catalog envelopes. Measures 9 by 12 inches each. Ideal for mailing catalogs, booklets, brochures, and multi-page documents. Easy-to-seal peel and Seal closure—no moisture needed. Durable 28-pound brown kraft material provides privacy and strength.
BrandAmazon Basics #ad
ManufacturerAmazon Basics #ad
Part NumberAMZP13

7. Mead


9" x 12", 20 per Box 76020, Mead Clasp Envelopes, Brown Kraft, Office Pak

Mead #ad - Heavyweight envelopes feature a clasp closure, in an Office Pak for larger quantity. 20 envelopes per box. Made in United States. Brown Kraft material. 9" x 12" size.
BrandMead #ad
ManufacturerACCO Brands #ad
Height14.45 Inches
Length0.88 Inches
Weight0.65 Pounds
Width9 Inches
Part Number76020

8. Mead


9" x 12", Brown Kraft, 100/Box CO790, Clasp, Mead Envelopes

Mead #ad - Extra heavy-duty opaque 32 lb. 9 x 12 inches; 100 envelopes per box. Durable multi-purpose envelope; dual purpose seal allows for multiple uses; use the moisture activated gummed seal for mailing or the strong metal clasp for repeated use and storage purposes. Brown kraft material provides privacy of contents.
BrandMead #ad
ManufacturerMead #ad
Height14.88 Inches
Length3.75 Inches
Width9.25 Inches
Part NumberCO790m

9. Blue Summit Supplies


100 9 X 12 Self Seal Security Catalog Envelopes, Securely Holds up to 60 Sheets of Paper with Strong Peel and Seal Flap 100 Envelopes, Designed for Secure Mailing

Blue Summit Supplies #ad - Safe for sensitive documents like tax, legal, and financial documents. Provides complete security: your documents are safe from others during transit. Just peel and seal to create a strong lasting seal: No need to worry about your contents failing out during transit even when shipping hefty shipments like 60 sheets of paper or magazines.

Allows for organized storage of personal and company documents due to its large size and Security Tint. Perfect size for standard 8. 5'' x 11'' letter paper, wide opening saves times when stuffing up to 60 sheets of letter paper securely. Great for storing receipts, tax returns, magazines, monthly financials, reports and more. Securely holds hefty files during transit due to it sturdy construction and thick 28 LB White Wove Paper.
BrandBlue Summit Supplies #ad
ManufacturerBlue Summit Supplies #ad
Weight3.97 Pounds
Part NumberBSS-92588-010

10. Quality Park


Quality Park Redi-Strip Catalog Envelopes, Brown Kraft, 9" x 12", Box of 100

Quality Park #ad - Get sales materials into the mail quickly with easy-to-use Quality Park catalog envelopes with Redi-Strip closures, so you'll have more time for creating your next big idea. Your project is hot off the press and ready to wow clients. Peel-away strip keeps adhesive free from dust. With this quality park redi-strip catalog envelopes box of 100, you'll always be prepared to send out materials. Made of heavy 28-lb durable kraft material. Redi-strip closure requires no moisture to seal.
BrandQuality Park #ad
Manufacturer0 #ad
Height2.9 Inches
Length12.2 Inches
Weight1 Pounds
Width9.4 Inches
Part Number44562