What kind of envelopes fit the three sizes of invitations?
For quarter-page invitations that print 4 cards per page, purchase 4-3/8″ x 5-3/4″ envelopes which are available at many office supply stores or online. Staples carries them etc. For half-page invitations that print 2 per page, use the A9 size envelope which measures 5-3/4″ x 8-3/4″. For 5″ x 7″ single card invitations, you can use the A7 size envelope which measures 5 1/4″ x 7 1/4″.