Quality Park Extra-Rigid Fiberboard Photo Document Mailers, Redi-Strip, White, 12.75x15, 25 per box (64019) EXTRA RIGID 12.75x15: Pack of 25 Envelopes, with redi-strip closure for convenient closure and Tear Strip for easy opening. RIGID-FIBERBOARD: No more bent contents! Rigid Fiberboard will resist any bending so your contents arrive at their destination in pristine condition! MULTI-PURPOSE: Use this for photos, important documents, CDs, books, certificates, etc. SECURE: Redi-Strip self-adhesive closure will ensure your contents stay safe with the licking factor out of mind REDUCE WASTE: Not only will the Redi-Strip save your time, it will save your money! These envelopes have a longer shelf life thanks to the peelable strip that protects your adhesive from dust!