Keepsake envelopes by 3L Scrapbook Adhesives ensures safe storage for cards, scrapbooks, tickets, stamps, coins and much more. It comes with re-sealable flap for constant use. The envelopes back are self-adhesive and can be decorated as desired. Each package includes 4small (2x2), 3 medium (2x4), 2 large (3.5x4, and 1 jumbo (4.5x5) envelopes.