Best Gummed Clasp Mailing Envelopes in 2026

Kraft Envelopes

Self-adhesive seal

Heavyweight

Clasp Envelopes

Heavyweight

25 per package

Clasp envelope (100-pack) for filing, storing, or mailing documents

Double-prong metal clasp closure and reinforced eyelet keep documents securely contained

Moisture-activated gummed surface on flap creates a permanent seal

Designed for repeated use, double prong metal clasp is durable and eyelets are reinforced.

Constructed from heavyweight 28-lb stock designed to give contents extra protection during mailing, storage and handling.

Feature a moisture activated secure seal with deep gumming on the flap to create a permanent seal.

9 x 12 CLASP ENVELOPE SET : Pack of 30 single reusable envelopes serves a variety of small & large documents for home, office, business, legal & school.

MADE IN USA, HEAVY DUTY PAPER : Extra strong, durable 28lb standard brown kraft envelopes proudly made right here in the united states provides confidential protection & exceptional rip, tear & puncture resistance - thank you for supporting american manufacturing!

DOUBLE SEAL DESIGN : Offers reliable security for personal & professional mailing; sturdy metal dual prong clasps & gummed seals w/ tough adhesive glue.

HEAVYWEIGHT ENVELOPE SET : Box of 100 single envelopes accommodates variety of small & large documents for home, office, business, legal & more.

SUPER STRONG CONSTRUCTION : Standard brown kraft envelopes are crafted of heavy, durable 28lb paper for exceptional rip, tear & puncture resistance.

DOUBLE SEAL DESIGN : Provides dependable security for work & personal mailing; features reusable dual prong clasps & gummed seals w/ tough adhesive glue.

Columbian Envelopes 6" X 9" Catalog envelopes are a safe, secure choice for smaller mailings

28 lb. White wove envelopes provide privacy, protection and durability; The perfect heavyweight stock for everyday business use

Top-loading envelopes make it easy to drop in flyers or other enclosures; ideal for flat rate mailings

Brite Hue Ultra Lime Green Paper Envelopes with Clasp Closure

Size: Open End Catalog (6 x 9 inches)

Quantity: 100 Envelopes per Box

Ideal for storing or sending important paper work

A great organizational method for school, home or work setting

A must have for school administrators, lawyers and HR representatives

9 x 12 Inches

Easily send or store receipts, letters, documents, magazines and more with our durable 10” x 13” clasp envelopes made from 28lb kraft paper

10” x 13” size means oversized papers, magazines, or other items that are larger than letter size can fit inside without being folded.

With a metal clasp and gummed seal on the envelope flap, your contents will stay secure whether you’re mailing them, or keeping them safe in a file.

Adequate supplies: 50 pieces clasp envelopes with flaps are available in 4 different sizes, you will get 26 pieces envelopes of 5 x 7 inch, 14 pieces envelopes of 6 x 9 inch, 8 pieces envelopes of 9 x 12 inch, 2 pieces envelopes of 10 x 13 inch, different sizes can hold various files in different sizes

Essential tools: the brown kraft catalog clasp envelopes are the practical stationery that most offices would need; Designed to provide extra protection for items during mailing, storage and handling, it is very suitable for daily household and business use

Quality material: the brown kraft catalog clasp envelopes with clasp seal are made of quality kraft material, safe and durable to use with a durable metal clasp and a reinforced eyelet on the open end, so you won't worry about the content suddenly falling out

Clasp - #35 - 5" Width x 7 1/2" Length - 28 lb - Clasp - Kraft - 10 / Pack - Brown Kraft

Heavy-duty, 28 lb. Brown Kraft

Metal clasp with rounded edges is plated for rust-resistance

Clasp - 8 3/4" Width x 11 1/2" Length - 28 lb - Clasp - Kraft - 10 / Pack - Brown Kraft

Heavy-duty, 28 lb. Brown Kraft

Metal clasp with rounded edges is plated for rust-resistance

Envelopes are perfect for sending contents you can't or shouldn't fold such as photographs and DVDs

Comes in brown and made of kraft

Dimensions: 6"L x 9"H; size #6.5

High Quality — 250gsm heavy manilla paper, 10pcs, great thickness and made by hand.

Elegant & Classic — 6 x 6 inches mini tiny square brown vintage envelopes with string tie closure, you can use them over and over again

Multiple Uses — Great for invitations, greeting cards, business meeting and decoration, seed packets, gift card sleeves, coin.

Large clasp envelopes are a staple in any office. Whether you need to mail a large document or just keep the pages of your annual report together in your desk, these Office Depot manila clasp envelopes can help.

Reinforced metal clasp closure helps secure your documents inside the brown envelopes.

Box of 100 envelopes.

High-quality material: The Keketer Gradient Color #10 Envelope is made from premium quality materials, ensuring durability and long-lasting use. The sturdy material protects the contents of the envelope from wear and tear during transit, making it ideal for mailing important documents or letters.

Unique gradient color: The envelope features a beautiful gradient color design that is eye-catching and attractive. The unique color gradient adds a touch of elegance and sophistication to any mailing, making it perfect for special occasions like weddings, birthdays, or other important events.

Versatile use: The Keketer Gradient Color #10 Envelope is suitable for a wide range of applications, including mailing letters, invitations, greeting cards, and other important documents. It is compatible with most standard printers and can be easily customized to include logos, addresses, or other branding elements.

Size: 9" x 12"

4 count

Heavyweight envelopes with clasp closing

Sold as 100/Box.

Catalog envelopes are a convenient and reliable choice for personal and business mailing purposes. Comes in brown and made of kraft. Dimensions: 12"L x 15.5"H; size #15.5. Clasp & moistenable glue for secured sealing. Envelopes come in boxes of 100, making them an easy and economical choice.

Metal Clasp With Rounded Edges Is Plated For Rust-Resistance.

Open-End Style Construction With Superior Gumming On Flap For A Secure Seal.

28 Lb. Brown Kraft Stock To Give Contents Extra Protection During Mailing, Storage And Handling.

Adequate quantity and suitable size: 100 pieces clasp envelopes with flaps are available in 3 different sizes; 50 Pieces envelopes of 5 x 7 inch, 30 pieces envelopes of 6 x 9 inch, 20 pieces envelopes of 9 x 12 inch, various sizes for you to choose, and sufficient quantity can meet your usage

Essential tools: these kraft catalog clasp envelopes are practical stationery needed in most offices; Designed to provide extra protection for items in the process of mailing, storage and handling, they are suitable for daily household and commercial usage

Quality material: featuring quality kraft material, these catalog envelopes with clasp seal are safe and reliable to use; Adopting a quality metal clasp and a reinforced eyelet on the open end, these envelopes will not let the content falling out easily

Assembly Required: No, Color: Brown, Mailer/Envelope Size: #97, 10" Width x 13" Length, Mailer/Envelope Size: #97, Material: Kraft

Features: Heavyweight

Sold as 1 pack

Clasp - #90 - 9" Width x 12" Length - 28 lb - Clasp - Wove - 10 / Pack - White

Gummed flap creates permanent closure to prevent peeling during transit

Double-prong clasp allows convenient interdepartmental use

Sold as 250/Box.

Catalog envelopes are a reliable choice for multiple kinds of personal and business mailing purposes. Made from brown kraft paper that conceals contents from prying eyes. Dimensions: 10"L x 13"H, size #13. Gummed and clasp closures keeps your documents secured inside the envelope. Envelopes come in boxes of 250, making them an easy, and economical choice for the business that needs to spend wisely without sacrificing quality. 20% post-consumer content. 20% total recycled content.

Made from brown kraft paper that conceals contents from prying eyes. 20% post-consumer content.

Heavy-duty, 28 lb. Brown Kraft

Reinforced-metal clasp with rounded edges is plated for rust-resistance

Open-end style construction with superior gumming on flap for a secure seal

✅ PACK of 100 [NOT INCLUDED ENVELOPES]. Button Size: Diameter 0.9 inch. ECO-FRIENDLY - Made from durable and tear-resistant paper.

✅ SIMPLE & EASY: String fastener also called “Maru tack” is a new type of button fastener with the sticker back by putting only for closures of envelopes and packages. The material is imported from Japan, its rust free compare with traditional metal clasp.

✅ EXPANDED PROJECT VERSATILITY: Our self-adhesive button fastener can to stick on wide range of different envelopes, packaging, boxes or mailers. It is a simple yet perfect solution to prevent the envelopes from being accidentally opened in transit.

⭐ CATALOG ENVELOPES. These 10" x 13" self-sealing envelopes are designed to save your time and money. No licking and long shelf life (free for dust). Suitable for home, office, business, legal and more.

⭐ SECURE. 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 half size catalogs or magazines.

⭐ WHITE 24LB STOCK. Perfect for everyday business use, these standard white envelopes are crafted of heavy, durable 24lb paper and securely holds hefty files during transit.

Two-prong clasp

Gummed flap

Reinforced eyelet

Plenty Quantity: you will receive 300 pieces of 6 x 9 inches kraft clasp envelopes; Each kraft catalog envelope comes with clasp closure and gummed seal, which can be self adhesive well; The sufficient quantity can meet your daily use needs, ideal for your office or home purpose

Double Seal: these 6 x 9 security envelopes can provide security for your work mails or personal mails, which have reusable dual prong clasps and tough rehydration glue, your contents will always stay secure, avoiding the contents from falling out during transiting

Ideal Size: these kraft clasp envelopes are about 6 x 9 inches/ 15.2 x 22.9 cm, which are suitable for storing your documents, letters, files, pictures, photos, papers and so on, keeping them organized