A9 Envelopes

A9 size envelopes are 5 3/4 x 8 3/4 inches.

Yes, A9 is a very invitation envelope size because they fit A9, 5 1/2 x 8 1/2 cards - half of a standard 8 1/2 x 11 sheet. This makes set up, printing, and cutting easy!

Yes, a half fold is another way of saying a standard letter sized sheet folded in half to yield a 5 1/2 x 8 1/2 inch card.

Based on shape and size along, A9 envelopes require just standard postage provided they are one ounce or under. Anything over an ounce, however, requires more. We recommend bringing one finished invitation ensemble to the post office to determine accurate postage.