are commonly referred to as Courtesy Reply Mail (CRM), Business Reply Mail (BRM), or return envelopes.

are one of the most popular commercial-sized window envelopes available, commonly used as a reply envelope for invoice and business mailings, sent to recipients inside #10 Envelopes in order to mail something back to the sender.

have a standard size of 4 1/8 inches high by 9 1/2 inches long. They're designed to hold a standard 8 1/2 x 11-inch piece of paper folded into three sections, making them practical for office use. They're perfect for sending invoices, checks, official correspondence, and other business letters.

Perfect to mail monthly statements, monthly bills, and utility bills (commonly referred to as “transactional” mail) are frequently mailed in number 10 envelopes. Direct mail and policy renewals from insurance companies will often use a #10 as well.

Also known as A2 invitation envelopes fit inside all larger "A" envelope sizes they're commonly used as an RSVP and return envelope, as 4 1/4 x 5 1/2 flat and folded cards (known as A2 note cards) fit inside.

perfect for invitations, social mailings, holding 4" x 6" photos, as an inner or outer invitation envelope, greeting cards, and more.

The most popular invitation size, A7 is a 5-1/4" x 7-1/4" envelope, classic looking and perfect for sending invitations, greeting cards, announcements, photos, and personalized communications.

Square flap business envelopes are often used to add a contemporary flair to correspondence.

Perfect to mail monthly statements, monthly bills, and utility bills (commonly referred to as “transactional” mail) are frequently mailed in number 10 envelopes. Direct mail and policy renewals from insurance companies will often use a #10 as well.

Perfect for mailing checks, invoices, letterhead, personal letters, statements, and direct mail.

Perfect to mail monthly statements, monthly bills, and utility bills (commonly referred to as “transactional” mail) are frequently mailed in number 10 envelopes. Direct mail and policy renewals from insurance companies will often use a #10 as well.

A professional way to send flat but bulky materials like pamphlets, brochures, sales literature, booklets, annual reports, magazines, or catalogs.

are great for mailing out sales brochures, annual reports product literature, mailing invoices, statements.

also called open-end envelopes, are great for larger inserts and supporting business documents without folding.

are often used for mailing flat documents, books, and reports. Opening on the short side with Center Seam.