A9 Invitation Envelopes (5.75X8.75) - Grey Parchment (80T) - 25 Pack Color: Gunmetal Size: A9 (5-3/4-x-8-3/4) Flap: Moisten to seal Envelopes made from high quality paper with a basis weight of 118 GSM (32/80lb Text) Insert must be smaller than envelope dimensions. This size nicely holds letter size paper folded in half.