Best Generic Envelopes 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

#10 business letter envelopes for personal or professional use

Includes 500 #10 envelopes made of 24-pound standard white woven paper for quality and strength; no tint

Moisture activated gummed closure ensures a secure seal

100-Pack of 6 envelopes with Peel & Seal closure—no moisture needed

Ideal for home or office; securely send checks, invoices, or other confidential documents

Interior security tint keeps content private; windowless design

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

Mead press it seal it number 10 security envelopes, 45 envelopes per box

White envelopes with self adhesive seal, Security lining for privacy

Size: 4 to 1/8 inches x 9 to 1/2 inches

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.

Country Of Origin : United States

Heavy 24Lb White Paper - Made In Usa

Package Weight : 6.1 Lbs

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

BUY IN BULK: Astrorights "Happy" 5-Color #10 Envelopes comes with 200 Envelopes so you never have to worry about running out. You'll get 40 colored envelopes of Venus Violet, Fireball Fuchsia, Cosmic Orange, Solar Yellow and Terra Green

PERFECT FOR EVERYDAY PROJECTS: Add a bright finishing touch on mail, notes home to parents, educational materials, classroom management and more! Whether in your home, office, or classroom, Astrobrights is the only choice to bring your ideas to life.

PRINTER COMPATIBLE: Works well with printers including inkjet and laser for jam-free every day printing. Plus, it's crafted to be lignin and acid-free for long-lasting results.

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

#6 3/4 SECURITY TINTED SELF SEAL ENVELOPES; want the very best in secure, security-tinted envelopes with a super strong self-seal? Aimoh's No. 6 3/4 Security Envelopes combine durable, printer-compatible paper, a security tinted design and strong self-seal QUICK-SEAL for the best #6 3/4 security self-seal envelopes on the market

SUPER SECURITY TINT PATTERN; #6 3 / 4 envelopes designed with a secure, security tint-pattern to protect contents and sensitive information, perfect for ultra-secure personal mailing while protecting sensitive information

300 ENVELOPE PACK; these envelopes are manufactured with a WINDOW-LESS front panel for the perfect choice for Personal Checks, home offices and everyday use, No. 6 3/4 Security Envelopes are provided in a 300-envelope pack

Envelopes for keeping checks, statements, letter size documents, and more securely contained while in transit

Includes 500 10 business envelopes made of premium 24-pound white woven paper

Security tinted interior provides added document privacy

Perfect for secure everyday home and business mailing. Our Security #10 Windowless Envelopes perfectly fit standard 8.5’’ x 11’’ paper sizes and other large documents. Easily fits invoices, letters, checks, and more.

Provides complete mail security. No need to worry about others seeing your documents, our dark black security tint completely hides you mail.

Just peel and seal to create a strong lasting seal without licking or moistening. Our self seal design is quick and easy and is guaranteed to stay sealed with no need for tape or glue sticks.

#10 SINGLE WINDOW SECURITY ENVELOPES; forget cheap, thin envelopes that allow contents to be easily read, our #10 Security Envelopes are premium quality, ultra secure envelopes suitable for everyday business and legal mailing while protecting sensitive contents and information

ULTRA STRONG QUICK SEAL; manufactured with ultra strong, quick seal adhesive, creating a super strong seal across the width of the envelope for a strong seal that won’t easily tear, perfect for mailing larger, thicker documents

EASY READ SINGLE WINDOW; perfect for bulk mailing, each envelope has a premium, extra large, easy read 4-1/2 X 1-1/8 poly-window, positioned 7/8" from the left and 1/2" from the bottom of the envelope, perfect for displaying addresses or business information, making slow printing and hand addressing a thing of the past

The envelope you use for your invitations is the first impression you make on your guests.Our kraft A7 envelopes with vintage and elegant looking is so suitable for any occasion. Simple and unadorned envelope are perfect for your sincere heart.

High quality and well-made envelopes--The size of kraft envelopes is 5.25*7.25 which is perfect for 5x7 cards and photos. Thick and nice brown envelopes are made of 140 gsm text paper. It will protect your surprise and privacy safe and sound.

Easy to use: Just wet the glue and press for a few seconds. Then everything will be done.

DOUBLE WINDOW SECURITY ENVELOPES; tired of cheap paper envelopes that can be easily seen through? Our Double Window Security Envelopes are ultra secure and perfect for mailing invoices, statements, standard business & legal documents, with super strong SELF-SEAL strip and tinted security patterns

TINTED SECURITY PATTERN; perfect for mailing invoices, statements, standard business & legal documents and sensitive correspondence, our #10 Envelopes are printed with a secure tinted pattern, easily obscuring numbers and data for premium, added security compared to other cheap envelopes

DUAL WINDOW DESIGN; easily read dual windows for everyday business mailings to easily display postal addresses. Each envelope contains two front windows, a 1" X 3-1/2" top window positioned 1/2" from the left and 2-1/2" from the bottom and the bottom 1-1/8 X 4" window is 1/2" from the left and 3/4" from the bottom

Made in USA.

Plain white envelopes

Moist and seal closure

Featuring a super-strong self-sealing adhesive strip, the envelopes letter size is built to withstand the rigors of transportation without opening or tearing. The powerful adhesive strip is a key element in ensuring the safe delivery of important items and information.

With its advanced security pattern, the #10 security mailing envelopes is the perfect solution for commercial and legal mailings, providing added protection for sensitive information.

The #10 envelopes (security envelopes peel and seal) also features a windowless design, allowing for easy printing, labeling or handwriting of addresses, making it both convenient and efficient.

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