Envelope Sizing made Easy

• Envelopes are almost always converted from text weight paper. The heavier the weight number, the heavier the envelope. A basic economy envelope will be converted from 20/50# paper. A nicer Invitation Envelope may be converted from 80lb text weight paper.  If you need more information on paper weights, be sure to check out our Paper Weights Simplified Article
• Announcement Envelopes such as A1, A2, A6, A7 and A9, generally have a square flap.
• We also sell Announcement envelopes that have a long triangular flap, these are called Euro Flap or deep flap envelopes.
• Baronial envelopes have a pointed flap and correspond to announcement envelope sizings: A1 Envelopes = 4 Bar Envelopes; A2 Envelopes = 5-1/2 Baronial Envelopes, A6 Envelopes = 6 Bar Envelopes and A7 Envelopes = Lee Envelopes.
• Cards, letter, invitations and inserts must all be smaller than their corresponding envelope size.  Be sure to read our handy article on Choosing the Correct Card Stock or Paper Size
• The sizing for Square Envelopes match their name. For instance, a 6 inch square envelope measures 6"x6".
• PLEASE NOTE: Enclosures for Square Envelopes must be at least ¼ “ smaller than the envelope size. The invitation size for a 6 inch square envelopes would need to be 5.75 inches by 5.75 inches or smaller (We recommend a 5.5" square invitation for a 6" square envelope). A 6 inch square envelope will not hold a 6 inch square invitation.
• A handy Guide for choosing your perfect invitation envelope can be found at the CutCardStock Blog.
• Be sure to check United States Postal Service for additional costs and sizing restrictions for specialty envelopes.
• Checkout our article on Envelope Addressing 101 andFun Envelope Addressing Ideas

Paper and Envelope Size Chart