Best Endoc Booklet Envelopes in 2026

#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

Heavyweight 5x7 envelopes in White; Our A7 Envelopes are made from a bright white, heavy paper stock with a Vellum finish giving you a clean durable envelope for your wedding invitations, greeting cards, or postcards. Unlike the Competition, our envelopes are manufactured from start to finish right here in the USA!

Bright White Vellum Finish; Made to a 98 brightness, these envelopes give you clean look & premium feel that can be easily written on or printed with an Inkjet or Laser printer.

Standard A7 Size & Design; These white A7 envelopes are made to the standard A7 size of 5 1/4" x 7 1/4" and feature a Gummed Booklet Style Square Flap

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

SUPER STRONG CONSTRUCTION – Standard White Envelopes Are Crafted of Heavy, Durable 24lb Paper for Exceptional Rip, Tear & Puncture Resistance

BOOKLET ORIENTATION – Classic Open From side Style Enables Fast, Convenient Stuffing for Letter, Legal Document, Pamphlet, crafts, Coupons, Greeting Card, Christmas Cards, Wedding Invitations, hand made greeting cards, folded letters, CDs, Other Common Mailers

LETTER SIZE PRICING – Ideal 6” x 9” Size Offers Maximum Space Within USPS 1-Stamp Dimension Requirements; Buy Bulk & Save Big on Both Supplies & Shipping

NO. 6 x 9 BOOKLET ENVELOPE PACK : 6” x 9” size business envelopes are perfect for mailing a variety of big documents including booklets, catalogs, forms, invoices & cards great envelopes for mailing tax returns ideal size for brochures, legal docs, wedding invitations & direct mailers offers maximum space within USPS 1-stamp dimension requirements; buy bulk & save big on both supplies & shipping.

DURABLE 24LB PAPER : These colored business envelopes are crafted from durable 24lb High quality Starburst paper. This makes them economical and durable.

BRIGHT COLOR : These brightly colored envelopes never fail to impress. Attractive and attention-grabbing, these multicolor envelopes are a popular choice for sending marketing mailers.

A6 Size Envelopes (4 3/4" x 6 1/2")

Made from Bright White 28lb bond / 70lb text (105 gsm) Paper Stock

Inkjet & Laser Printer Compatible

A Quantity of 500 - 9 x 12 Booklet Envelope - 28# White

28# White Wove Paper - Regular Gummed Flap

Great for mailing Invoices, statements, catalogs or announcements.

9 X 12 White Envelope

Booklet / Open Side Style

150 Envelopes per Box

NO. 9 x 12 BOOKLET ENVELOPE PACK : 9” x 12” size open side business envelopes are perfect for mailing a variety of big documents including booklets, catalogs, forms, invoices & cards great envelopes for mailing tax returns ideal size for brochures, legal docs, wedding invitations & direct mailers.

DURABLE 24LB PAPER : These colored business envelopes are crafted from durable 24lb High quality Starburst paper. This makes them economical and durable.

BRIGHT COLOR : These brightly colored envelopes never fail to impress. Attractive and attention-grabbing, these multicolor envelopes are a popular choice for sending marketing mailers.

THICK and DURABLE ENVELOPES - made from the most popular business letterhead or stationery weight of 24lb bond / 60lb text paper that greatly holds mailing documents; Gummed Booklet Style Square Flap that provides extra security for document's safe-keeping

STANDARD A2 SIZED ENVELOPES - 4 3/8” x 5 3/4” inches that fit any 4.25 x 5.5 letters, postcards, greeting cards, photos, announcements, social and invitation purposes and more; ideal large reply envelope size that fits inside A7, A8, A9 and A10 sizes envelopes

PERFECT FOR BUSINESS OR PERSONAL USE - great for enclosing your Save the Dates, DIY Invitations, Thank you cards, Graduation announcements, Do-It-Your-self Greeting Cards, and business correspondence; it can be hand addressed or professionally printed

Columbian 6 x 9 Booklet Envelopes are a safe, secure choice for smaller mailings

24 lb. White wove paper provides a crisp professional look; side-seam construction creates a smooth, fold-free back panel for printing

Booklet orientation; these side-loading envelopes make it easy to drop in thick stacks of documents

White Booklet Envelope

Size: 8.75 x 11.5 inches

Made from high qualuity 24lb paper

10 X 13 White Envelope

Booklet / Open Side Style

100 Envelopes per Box

THICK and DURABLE ENVELOPES - made from the most popular business letterhead or stationery weight of 24lb bond / 60lb text paper that greatly holds mailing documents; Gummed Booklet Style Square Flap that provides extra security for document's safe-keeping

STANDARD A6 SIZED ENVELOPES - 4.75” x 6.5” inches that fit any 4x6 letters, postcards, greeting cards, photos, announcements, social and invitation purposes and more; ideal large reply envelope size that fits inside A7, A8, A9 and A10 sizes envelopes

PERFECT FOR BUSINESS OR PERSONAL USE - great for enclosing your Save the Dates, DIY Invitations, Thank you cards, Graduation announcements, Do-It-Your-self Greeting Cards, and business correspondence; it can be hand addressed or professionally printed

THICK and DURABLE ENVELOPES - made from the most popular business letterhead or stationery weight of 24lb bond / 60lb text paper that greatly holds mailing documents; Gummed Booklet Style Square Flap that provides extra security for document's safe-keeping

STANDARD A7 SIZED ENVELOPES - 7 1/4” x 5 1/4” inches that fit any 5 x 7 letters, postcards, greeting cards, photos, announcements, social and invitation purposes and more; ideal large reply envelope size that fits inside A8, A9 and A10 sizes envelopes

PERFECT FOR BUSINESS OR PERSONAL USE - great for enclosing your Save the Dates, DIY Invitations, Thank you cards, Graduation announcements, Do-It-Your-self Greeting Cards, and business correspondence; it can be hand addressed or professionally printed

THICK and DURABLE ENVELOPES - made from the most popular business letterhead or stationery weight of 24lb bond / 60lb text paper that greatly holds mailing documents; Gummed Booklet Style Square Flap that provides extra security for document's safe-keeping

STANDARD A7 SIZED ENVELOPES - 5.25” x 7.25” inches that fit any 5x7 letters, postcards, greeting cards, photos, announcements, social and invitation purposes and more; ideal large reply envelope size that fits inside A8, A9 and A10 sizes envelopes

PERFECT FOR BUSINESS OR PERSONAL USE - great for enclosing your Save the Dates, DIY Invitations, Thank you cards, Graduation announcements, Do-It-Your-self Greeting Cards, and business correspondence; it can be hand addressed or professionally printed

THICK and DURABLE ENVELOPES - made from the most popular business letterhead or stationery weight of 24lb bond / 60lb text paper that greatly holds mailing documents; Gummed Booklet Style Square Flap that provides extra security for document's safe-keeping

STANDARD A7 SIZED ENVELOPES - 7 1/4” x 5 1/4” inches that fit any 5 x 7 letters, postcards, greeting cards, photos, announcements, social and invitation purposes and more; ideal large reply envelope size that fits inside A8, A9 and A10 sizes envelopes

PERFECT FOR BUSINESS OR PERSONAL USE - great for enclosing your Save the Dates, DIY Invitations, Thank you cards, Graduation announcements, Do-It-Your-self Greeting Cards, and business correspondence; it can be hand addressed or professionally printed

9x12 White booklet envelope.

Great for mailing out sales brochures, annual reports, and product literature

Envelope open on the side.

Reskid 6 x 9 Booklet Envelopes are a safe, secure choice for smaller mailings

24 lb. White wove paper provides a crisp professional look; side-seam construction creates a smooth, fold-free back panel for printing

Booklet orientation; these side-loading envelopes make it easy to drop in thick stacks of documents

Catalog Envelopes: These Guardian small envelopes self seal are perfect for business or personal use. Our business envelopes have an open-end design that simplifies inserting documents, booklets, templates, and more into the envelopes.

Multi-Purpose: Our bulk envelopes 6x9 come in a set of 500 small white envelopes in a box. These white booklet envelopes are ideal for storing important documents and business materials – including catalogs, booklets, multi-page documents, statements, financial documents, legal and insurance papers, and more.

Strong Seal: Our 6x9 envelopes small size feature an adhesive, gummed flap that seals securely when moistened. Our envelopes self seal will effectively contain the items you place inside.

10x13 Booklet white Multi-purpose envelopes.

These Booklet envelopes standard 28 lb white stock

Has Moisture activated gummed seal.

✉ FINE and DURABLE ENVELOPES – Made from the most popular business letterhead or stationery weight of 24lb Bond / 60lb Text (90gsm) paper. It's thick and durable with a Gummed Booklet Style Square Flap that provides extra security.

✉ STANDARD A2 SIZED ENVELOPES – Measures 4 3/8 x 5 3/4 inches and fits any 4.25 x 5.5 letters, postcards, greeting cards, photos, invitations, announcements and more! Ideal large reply envelope size that fits inside A7, A8, A9 and A10 envelopes.

✉ PERFECT FOR BUSINESS OR PERSONAL USE – Great for enclosing personal cards like Save-the-Dates, Thank You Cards to Business Greeting Cards and Invitations. It can be hand addressed or professionally printed.

Ideal for direct mail, annual reports, catalogs and brochures.

Opens along the long side for faster, easier insertion of contents.

Made of bright, 24-lb white wove paper.

Booklet Envelopes - 28lb. Brown Kraft

Brown kraft booklet envelopes Great for mailing Invoices, statements, catalogs or announcements brochures, annual reports, and product literature.

A Quantity of 50

Reskid 9 x 12 Booklet Envelopes are a safe, secure choice for smaller mailings

24 lb. White wove paper provides a crisp professional look; side-seam construction creates a smooth, fold-free back panel for printing

Booklet orientation; these side-loading envelopes make it easy to drop in thick stacks of documents

✉ FINE and DURABLE ENVELOPES - made from the most popular business letterhead or stationery weight of 24lb bond / 60lb text paper that greatly holds mailing documents; Gummed Booklet Style Square Flap that provides extra security for document's safe-keeping

✉ STANDARD A6 SIZED ENVELOPES - 4 3/4” x 6 1/2” inches that fit any 4 x 6 letters, postcards, greeting cards, photos, announcements, social and invitation purposes and more; ideal large reply envelope size that fits inside A7, A8, A9 and A10 sizes envelopes

✉ PERFECT FOR BUSINESS OR PERSONAL USE - great for enclosing your Save the Dates, DIY Invitations, Thank you cards, Graduation announcements, Do-It-Your-self Greeting Cards, and business correspondence; it can be hand addressed or professionally printed