Invitation Envelope Size Guide

Social and Invitation Envelope Size Guide A1/4Bar A2 A6 3.625 x 5.125 4.375 x 5.75 4.75 x 6.5 Smallest mailable size for US mail - Ideal size for thank you cards - Second most popular card size - Ideal size for RSVP cards - One quarter of a piece of paper - Popular size for wedding and event invitations A7 Most popular greeting card size A8 - Ideal size for save the date cards 5.25 x 7.25 5.5 x 8.125 A9 A10 5.75 x 8.75 6 x 9.5 - Fits a folded piece of paper %3D - Most common size for a folded piece of paper - Popular for invitations - Ideal for oversized invitations SQUARE POLICY MONARCH MINI/TINY More: *required additional postage *opens on the short side *Not mailable *3.875 x 7.5 *used for place cards