A7 Envelopes (5 1/4 x 7 1/4) in Laser Pink with Silver Glitter are an eye-catching, bright pink color with silver hexagon shaped glitter made of tissue paper. The A7 envelope size is the perfect invitation envelope and also great for mailings, holding 5 x 7 photos, invitations, announcements and more. A7 Envelopes are commonly called 5 x 7 Envelopes because they are the best envelope for 5 x 7 cards.