Best Columbian in 2026

Get a box of 100 Columbian 9 x 12 envelopes with SimplySafe tamper-evident pull strips and security tinted interiors for mailing sensitive oversized documents; easy peel off Release & Seal closure

Columbian 9 x 12 envelopes have a patented SimplySafe seal that will show signs of tampering, safeguarding against unauthorized opening

Security envelopes have a strong security tint pattern so you can't see what's inside; ideal for obscuring more sensitive information and protecting critical documents

Get a jumbo box of 500 Columbian double window #8 5/8 envelopes (3-5/8" x 8-5/8") each with a SimplySafe tamper-evident pull strip, security tinted interior, and easy peel off Release & Seal closure

These security envelopes have a patented SimplySafe seal that will show signs of tampering, safeguarding you against unauthorized opening

Each white envelope is made from 24 lb white wove paper with an interior security tint pattern so you can't see what's inside; ideal for obscuring sensitive information & protecting critical documents

Get a jumbo box of 500 Columbian self seal #10 envelopes (4-1/8" x 9-1/2") each with a security tinted interior and easy peel off Release & Seal closure

These self seal envelopes have a Release & Seal peel strip; peel off the paper strip and press down for a permanent seal; it's simple, clean, and sanitary with no moisture required

Security envelopes have a strong security tint pattern so you can't see what's inside; ideal for obscuring more sensitive information and protecting critical documents

✉️ 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

✉️ SUPER SECURITY TINT PATTERN; #10 envelopes designed with a secure, security tint-pattern to protect contents and sensitive information, perfect for ultra-secure mailing

✉️ 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

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.

【Violet 8.5X12" Padded Mailers】 Our violet padded mailers are a reliable shipping and packaging solution for your retail or online business. These pink bubble mailer envelopes measure 8.5x12 inches, pack of 25 mailers. These colorful padded mailers are a fun and fashionable way to ship your packages. Add some color and a personalized touch to each package you send to your customers. Make your business stand out from the rest and build a lasting impression.

【Simply Peel & Seal】 Each padded mailer bag contains a strong self-sealing adhesive strip. Simply peel and fold over to seal each package safely and securely. Poly bubble mailers are a cost-effective and efficient way to ship all your packages. Perfect for online business and e-retail use. These mailers are convenient, lightweight, and will help to save on shipping costs. Eliminate the need for costly shipping boxes and tape by using mailers instead - and watch the savings add up!

【Strong & Durable Construction】 Our padded bubble mailers are crafted with only the finest materials. Ship your packages confidently with our strong and durable mailers. Each mailer is equipped with a strong self-sealing adhesive strip that is tamper-resistant and tamper-evident. These padded mailers are tear-resistant, puncture-resistant, and waterproof. You can count on our sakura padded poly mailers to weather the elements and keep your packages safe until they reach their destination.

100-Pack of 6 x 9 inch catalog envelopes

Durable 28-pound brown kraft material provides privacy and strength

Easy-to-seal Peel and Seal closure—no moisture needed

100-Pack of 9 x 12 inch catalog envelopes

Durable 28-pound brown kraft material provides privacy and strength

Easy-to-seal Peel and Seal closure—no moisture needed

Heavyweight envelopes feature a clasp closure, in an Office Pak for larger quantity

9" x 12" size

Brown Kraft material

250-Pack of 9 x 12 inch catalog envelopes

Durable 28-pound brown kraft material provides privacy and strength

Easy-to-seal Peel & Seal closure—no moisture needed

100 UNPADDED 10x13 INCH POLY MAILERS: Pack contains 100 poly mailers in 10x13" size. These envelopes are UNPADDED and can be used for shipping non-fragile items.

SHIP IN STYLE: Our top quality mailing bags in a large selection of designer prints will help you to distinguish your brand by personalizing the experience for the customer, creating a remarkable and memorable moment upon receipt.

CONFIDENTIAL, DURABLE AND SECURE: Our mailers are 3.15mil thick, 57.5% thicker than the standard 2mil. This makes them durable, opaque, and weather resistant. Extra secure adhesive creates a strong, tamper-evident seal that ensures shipments will not open.

SUPER STRONG CONSTRUCTION – Standard White Envelopes Are Crafted of Heavy, Durable 28lb Paper for Exceptional Rip, Tear & Puncture Resistance

SELF SEALING CLOSURE - makes securing contents quick and easy. Peel off the protective strip and press the flap firmly to create a tight bond that seals the contents safely inside the envelope

HEAVYWEIGHT ENVELOPE SET – Pack of 15 Single Envelopes Accommodates Variety of Small & Large Documents for Home, Office, Business, Legal & More

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

TEAL 6X10 PADDED BUBBLE MAILERS - Our custom teal color padded poly mailers are a reliable shipping and packaging solution for your retail or online business. These poly bubble mailer envelopes measure 6x10" inches, pack of 25 bubble mailers. These teal padded mailers are a fun and fashionable way to ship your packages. Add some color and a personalized touch to each package you send to your customers. Make your business stand out from the rest and build a lasting impression.

SIMPLY PEEL & SEAL - Each poly bubble mailer contains a strong self-sealing adhesive strip. Simply peel and fold over to seal each package safely and securely. Poly bubble mailers are a cost-effective and efficient way to ship all your packages. Perfect for business and retail use. These bubble mailers are convenient, lightweight, and will help to save on shipping costs. Eliminate the need for costly shipping boxes and tape by using poly bubble mailers instead - and watch the savings add up!

STRONG & DURABLE CONSTRUCTION - Our poly bubble mailers are crafted with only the finest materials. Ship your packages confidently with our strong and durable poly mailers. Each mailer is equipped with a strong self-sealing adhesive strip that is tamper-resistant and tamper-evident. These bubble poly mailers are tear-resistant, puncture-resistant, and waterproof. You can count on our padded poly mailers to keep your packages safe until they reach their destination.

#10 SECURITY TINTED SELF SEAL ENVELOPES; forget cheap envelopes that easily split and aren't suitable for secure mailing, our #10 envelopes are designed with a premium security tint to protect sensitive information and a super strong SELF-SEAL strip, perfect for larger documents

PREMIUM SECURITY TINTED PATTERN; our #10 envelopes are designed with a premium security printed design to protect contents and sensitive information, perfect for secure business and legal mailing while protecting sensitive information

WINDOWLESS DESIGN; envelopes ideal for standard business & legal documents and sensitive correspondence, manufactured with a windowless front panel for easy printing, labeling or hand-addressing, perfect for quick, mass business mailings

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

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

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

🍀【Opaque Poly Bubble Mailers】 The light pink bubble mailers outer size is 8.5x12 inch, while the inner size is 8.5x11 inch. With full air bubbles, our bubble mailers can protect your value products from damage caused by external impacts. The inner lining is using gray film, even if there is strong light, the items in the bag cannot be seen, which can protect your privacy well.

🍀【Strong Self Sealing Adhesive】 Our padded envelopes is using four-season adhesive, which can maintain strong stickiness throughout the year, even if the weather is very hot or cold. The strong stickiness prevents your items from being secretly replaced during transportation. The adhesive is covered with silver strip, which are easily peel off the strip and seal the bag.

🍀【Sturdy & Durable Construction】 The thicken shipping bags covers with polyethylene material, making them not easily punctured and damaged. Beside, the shipping bags features with excellent waterproof and tearing proof effects because of the reinforce sealing on the edge. They can keep your value stuff safely to destination even though using on foggy or rainy days.

500 PACK SELF SEAL BUSSINESS ENVELOPES：HERKKA #10 Security envelopes are designed with Peel & Seal closure—no moisture needed and a premium security tint to protect sensitive information and a super strong SELF-SEAL strip.perfect for home or office; securely send checks, invoices, or other confidential documents.

PREMIUM SECURITY TINT PATTERN: The interior of our #10 Security envelopes use a dark navy, heavy coverage security tint to provide guaranteed privacy for your legal or business mail, offer the protection contents and sensitive information, a security tint makes envelopes hard to see through that ensures upmost privacy.

PERFECT FOR CHECK PRINTING DESIGN: HERKKA envelopes ideal for standard business & legal documents and sensitive correspondence, manufactured with a windowless blank design allows for easy address printing or labels for mass mailing or to simply keep a bulk supply on hand for your home office. Perfect for quick, mass business mailings.

【Large Bubble Mailers】Our 10.5x16 inch (inner size is 10.5x15) inchpadded mailers 25 pack are a reliable shipping and packaging solution for your store or online business. Add some color and a personalized touch to each package you send to your customers. Violet bubble mailers make your business stand out from the rest and build a lasting impression.

【Strong & Durable Construction】The Poly bubble mailer are crafted with only the finest materials. This opaque bubble envelopes are tamper-resistant by its strong adhesive, improving product privacy.Polyethylene film provide Waterproof, moisture-proof, puncture-proof, tear-proof , which exceptionally protect your packages from being damp or damaging.

【Convenient & Economical】 Each mailer contains a strong self-sealing adhesive strip. Simply peel and fold over to seal each package safely and securely.Eliminate the need for costly shipping boxes and tape by using padded bubble mailers instead. Poly padded envelopes are lightweight, and will help to save on shipping costs.

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

Usable dimensions: 6'' x 9'', outer dimensions: 6.69'' x 9.84.

100 packs in total.

Clear outer face.

Stock up on bubble mailers for your online or home business; you get 50 white poly mailers with an easy peel off closure and a useable size of 6 x 9

Air filled bubbles in these shipping envelopes soften the impact of travel: bubble mailers neatly & safely transport books, jewelry, CDs or DVDs & more from your online shop or small business

Each white bubble mailer is made of durable, wear & tear resistant poly to keep items inside dry and protected; the perfect packing envelopes for shipping and a unique calling card on their doorstep!

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

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.

Extra heavy-duty opaque 32 lb. brown Kraft material provides privacy of contents

9 x 12 inches; 100 envelopes per box

【9 X 11.5 Inches, 25 Packs 】Premium quality ValBox document mailers dimension is 9.25 x 11.75 inches. Great material makes them super perfect to protect art prints, photos, CDs, books, certificates, documents, paper, etc.

【Peel & Seal】These photo mailers are easy to peel and seal with a strong flap adhesive, no licking of glue or water to moisten when working with multiple mailings. Tear strip design for photo mailer also helps you open its package without struggle. Good job in saving your precious time.

【Provides Complete Security】 Upgraded adhesive on cardboard mailers creates a strong lasting seal and prevents your contents from falling out during transit. Protect them carefully and shape them well. No need worry about leaking privacy.

Size: 7.5 x 5.5 inches, Pack of 100 pcs

Clear outer face, you can clearly see the label or invoice inside the transparent bags

Fast simple application: simply peel off the paper backing and stick it to package

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

White Poly Mailers - Our custom colored shipping bags are a reliable shipping and packaging solution for your retail or online business. These shipping envelopes measure 12x15.5 inches, pack of 100 poly mailers. These colorful mailing bags are a fun and fashionable way to ship your packages. Add some color and a personalized touch to each package you send to your customers. Make your business stand out from the rest and build a lasting impression.

Simply Peel & Seal - Poly mailers contains a strong self-sealing adhesive strip. Simply peel and fold over to seal each package safely and securely. Shipping bags are a cost-effective and efficient way to ship all your packages. Perfect for business and retail use. These mailers poly bags are convenient, lightweight, and will help to save on shipping costs. Eliminate the need for costly shipping boxes and tape by using poly mailers instead - and watch the savings add up!

Strong & Durable Construction - Our shpping bags are crafted with only the finest materials. Ship your packages confidently with our strong and durable mailing envelopes. Each mailer is equipped with a strong self-sealing adhesive strip that is tamper-resistant and tamper-evident. These package bags are tear-resistant, puncture-resistant, and waterproof. You can count on our mailing bags to keep your packages safe until they reach to destination.