JAM PAPER Stay-Flat Photo Mailer Envelopes with Peel & Seal Closure - 13 x 18 - Black - 6 Rigid Mailers/Pack Black Recycled Stay Flat Photo Mailers Size: 13 x 18 inches Quantity: 6 Mailer Envelopes per Pack Features a self-adhesive strip for quick and easy closure & is made from 100% recycled content These photo mailing envelopes are available in a variety of sizes.