A6 (4 3/4 X 6 1/2) Brite Hue Christmas Red Envelope - 25 Envelopes Per Pack A6 Size Envelope (4 3/4" x 6 1/2") Perfect to accompany 4" x 6" photos / Christmas & Holiday Cards. Perfect for Greeting Cards, Invitations, Weddings or any announcement. Inkjet & Laser Compatible This paper is acid free, archival, and made from 30% post consumer paper.