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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). PLEASE NOTE: Enclosures for Square Envelopes must be at least ¼ “ smaller than the envelope size.For instance, a 6 inch square envelope measures 6"圆". The sizing for Square Envelopes match their name.Be sure to read our handy article on Choosing the Correct Card Stock or Paper Size Cards, letter, invitations and inserts must all be smaller than their corresponding envelope size.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.We also sell Announcement envelopes that have a long triangular flap, these are called Euro Flap or deep flap envelopes.Announcement Envelopes such as A1, A2, A6, A7 and A9, generally have a square flap.If you need more information on paper weights, be sure to check out our Paper Weights Simplified Article
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A nicer Invitation Envelope may be converted from 80lb text weight paper. A basic economy envelope will be converted from 20/50# paper. The heavier the weight number, the heavier the envelope. Envelopes are almost always converted from text weight paper.
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