Best Packagingsuppliesbymail Envelopes And Mailing in 2026

Box of 100 windowless #10 security envelopes with a Redi-Strip peel and seal closure

Security envelopes have a special security tint pattern that obscures what's inside; ideal when you're sending more sensitive material through the mail

Self seal envelopes are quick, easy and more clean and sanitary than gummed envelopes; with a Redi-Strip closure, just peel off the strip and press closed for a secure seal; no moisture needed

Reusable, double prong metal clasp is durable and designed for repeated use and eyelets are reinforced . Great for home, office, school, interoffice or mailing.

Perfect for everyday home and business use, clasp envelopes are made from heavyweight 28 lb. brown Kraft stock to give contents extra protection during mailing, storage and handling.

In addition to the clasp closure, these envelopes have a moisture activated seal with deep gumming on the flap to create a permanent seal.

Quality Park's 6 x 9 catalog envelopes are perfect for holding folded documents or smaller items. They are great for mailing, storage and organizing in both home and office environments.

Redi-Strip provides a clean, quick seal immediately upon contact. Simply peel off the adhesive strip and press to seal. The peel-off strip protects the adhesive from dust for a longer shelf life

Manufactured from heavyweight 28 lb. white wove stock to give contents extra protection during mailing, storage and handling

These Quality Park 8 3/4x11 1/2 clasp envelopes are made of extra heavy-duty 32 lb kraft; with clasp & gummed closures to file or ship; 100 per b0x

Envelopes have durable 2 prong metal clasps and reinforced eyelets to let you access your files as needed; open, close, repeat

A deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail

SAVE TIME WITH SELF-STICK: Quality Park 6 3/4 Security Envelopes have a strong peel & stick closure that helps you fly through mailings in record time

ENHANCED SECURITY: Offer the protection clients deserve & protect yourself from liability; a security tint makes envelopes hard to see through; a security pattern scrambles the appearance of text

LESS YUCK: We promise you won't miss licking envelopes or crumbly, drippy sponges; complete your mailings, no accessories required

Quality Park 6x9 clasp envelopes are a staple of every office; a gummed flap and reusable clasp make them ideal for mailing and storage; 100 per box

Our yellow envelopes have durable 2 prong metal clasps and reinforced eyelets to let you access your files as needed; open, close, repeat

A deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail

Quality Park 10x13 clasp envelopes are a staple of every office; a gummed flap and reusable clasp make them ideal for mailing and storage; 100 per box

Our yellow envelopes have durable 2 prong metal clasps and reinforced eyelets to let you access your files as needed; open, close, repeat

A deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail

Quality Park 12x15 1/2 clasp envelopes are a staple of every office; a gummed flap & reusable clasp make them ideal for mailing and storage; 100/box

Envelopes have durable 2 prong metal clasps and reinforced eyelets to let you access your files as needed; open, close, repeat

A deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail

Quality Park 7x10 clasp envelopes are a staple of every office; a gummed flap & reusable clasp make them ideal for mailing and storage; 100/box

Envelopes have durable 2 prong metal clasps and reinforced eyelets to let you access your files as needed; open, close, repeat

A deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail

DESIGNED FOR REPEATED USE: Double prong metal clasp is durable and eyelets are reinforced

PERMANENT SEAL: In addition to the clasp closure, the deep gumming on the flap can create a permanent seal

HEAVY DUTY: Extra durable, 32 lb. brown Kraft stock gives contents extra protection during mailing, storage and handling

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.

Envelopes with Redi-Strip closure are perfect for storing and mailing letters, documents, catalogs, photos and other home and business mailings.

Manufactured from a durable stock for extra protection in mailing, storage and handling.

Redi-Strip provides a clean, quick seal immediately upon contact. Simply peel off the adhesive strip and press to seal. The peel-off strip protects the adhesive from dust for a longer shelf life.

DURABLE: Made from heavyweight 28 lb. paper stock

GUMMED: Fully gummed flaps provide a secure seal to keep contents secured

MULTI-PURPOSE: These 12 x 15.5 envelopes are perfect for storing and mailing documents, catalogs, photo's and other home and business mailings

These 9x12 envelopes with a self seal Redi-Tac clasp eliminate USPS charges for metal parts; reusable & thrifty; made of 28 lb kraft paper; 100/box

Reseal your ClearClasp envelope with Redi-Tac seal as many times as needed for circulating interoffice mail; just press and go

A deeply gummed yellow envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail

MULTI-USE: Quality Park's 10 x 13 catalog envelopes are the perfect size for holding 8-1/2 x 11 documents, photos and catalogs. They are great for mailing, storage and keeping things organized in both home and office environments.

BROWN KRAFT 28 LB STOCK: Perfect for everyday home and business use, Quality Park's catalog envelopes are constructed from heavyweight 28 lb. brown kraft stock designed to give contents extra protection during mailing, storage and handling.

REDI-STRIP SELF SEAL REMOVABLE STRIP: provides a clean, quick seal immediately upon contact. Simply peel off the adhesive strip to create a full, secure seal that won't open or tear. The self-seal peel-off strip protects the adhesive from dust for a longer shelf life.

Quality Park 9 x 12 catalog mailing envelopes are ideal for large or heavy inserts; made of thick kraft paper with strong center seams; 250 per box

Sturdy Quality Park envelopes are manufactured from 28 lb. kraft paper; ideal for privacy and durability; a no clasp envelope is also easier to mail

A wide, heavily gummed envelope flap provides a secure, permanent seal for bulky inserts; center seam construction withstands weight and wear & tear

Our 500-ct Quality Park #10 double window envelopes (4-1/8 in x 9-1/2 in) fit select QuickBooks invoices & statements; our self sealing envelopes have Redi-Seal press-to-seal flaps & security tints

Redi-Seal mailing envelopes have a unique double flap design that requires no moisture; just raise the lower flap and press for a no-fuss self seal envelope

Double window envelopes show just the sender & receiver addresses; our business envelopes keep private info out of view; top window: 1" x 3-1/2"; bottom: 1-1/8" x 4"; envelope: 4-1/8" x 9-1/2"

Reusable

Deep gumming for a secure seal

Double prong metal clasp and reinforced eyelet

These boxes of 500 white #8 5/8 double window security envelopes (3 5/8 in x 8 5/8 in) protect your customers' sensitive data; a reflex blue pattern obscures the details of what's inside

Redi-Seal self seal mailing envelopes require no moisture; the unique double flap design allows you to simply raise the lower flap and press to seal

Double window envelopes show sender and receiver addresses; top window: 3 5/8" x 8 5/8"; 5/8" from the left; 2 1/4" from the bottom; bottom window: 1" x 4", 5/8" from the left; 2 1/4" from the bottom

Quality Park no.8 double window envelopes are a perfect fit for QuickBooks & other computer checks; with security tint for privacy & a Redi Strip self seal closure for fast easy mail days; 500 per box

Our No 8 mailing envelopes are a little bit wider and roomier than your standard check envelope; 3 5/8 x 8 11/16 inches wide to more easily fit wider QuickBooks checks & other computer laser checks

Double window envelopes display just the sender & receiver addresses; precise measurements keep check amounts and memo lines out of view

Our big box of 500 #9 double window envelopes (3-7/8 in x 8-7/8 in) fit QuickBooks invoices & statements, not checks!; our self sealing envelopes have Redi-Seal press-to-seal closures & security tints

Redi-Seal mailing envelopes have a unique double flap design that requires no moisture; just raise the lower flap and press for a no-fuss self seal envelope

Double window envelopes show just the sender and receiver addresses; our business envelopes keep private info out of view; top window: 1-3/16" x 3-1/2"; bottom: 1" x 4"; envelope: 3-7/8" x 8-7/8"

Survivor Catalog Mailers made with DuPont Tyvek material are super durable, yet lightweight for important, cost-effective shipments; stock up on 100 white 6" x 9" envelopes

Catalog mailers made with DuPont Tyvek are tough enough to resist damaging punctures, tearing and moisture from shipping

Perfect for shipping smaller products to customers or selling personal items online, 6" x 9" lightweight mailing envelopes can reduce postage costs

Our clear packing list envelopes have an adhesive back and durable liner to secure your documents in a 4-1/2" x 5-1/2" poly pouch; 100 per carton

Clear window allows the shipping address to show through the envelope window, saving you a step

Help them find your invoice; a bright orange text block shows your "packing list/invoice" is enclosed; makes it easy to spot your shipping documents

MULTI-PURPOSE: These 10 x 13 envelopes are perfect for storing and mailing full size 8-1/2 x 11 sheets of paper, letters, documents, catalogs, photo's and other home and business mailings

DURABLE: Made from heavyweight 28 lb. paper stock

GUMMED: Fully gummed flaps provide a secure seal to keep contents secured

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.

Quality Park 9x12 clasp envelopes are a staple of every office; a gummed flap and reusable clasp make them ideal for mailing and storage; 100 per box

Our brown envelopes have durable 2 prong metal clasps and reinforced eyelets to let you access your files as needed; open, close, repeat

A deeply gummed envelope flap is laid thick with moisture-activated adhesive; creates a firm seal you can trust in the mail

DURABLE: Made from heavyweight 28 lb. paper stock

GUMMED: Fully gummed flaps provide a secure seal to keep contents secured

MULTI-PURPOSE: These 9.5 x 12.5 envelopes are perfect for storing and mailing documents, catalogs, photo's and other home and business mailings

Quality Park 9 x 12 catalog mailing envelopes are ideal for large or heavy inserts; made of thick kraft paper with strong center seams; 100 per box

Sturdy Quality Park envelopes are manufactured from 28 lb. kraft paper; ideal for privacy and durability; a no clasp envelope is also easier to mail

A wide, heavily gummed envelope flap provides a secure, permanent seal for bulky inserts; center seam construction withstands weight and wear & tear

GUMMED: Fully gummed flaps provide a secure seal to keep contents secured

MULTI:PURPOSE: These 9 x 12 envelopes are perfect for holding documents flat for when folding is undesired

VERSATILE: Great for mailing, storage, and organizing in both home and office environments

Quality Park 37181 Open Side Booklet Envelope, Contemporary, 9 x 6, White, 500/Box

All purpose envelope is ideal for mailing catalogs, promotional materials, documents and more. Horizontal, file-style orientation simplifies content insertion and removal.