These are 5 mil thick thermal laminating pouches for use in a thermal laminator. They are letter size pouches.Scotch Thermal Laminating Pouches are ultra-clear pouches that protect and add professionalism to documents you use frequently. These laminating pouches allow important information to show through with a clear, photo-safe finish. Lamination pouches are ideal for creating marker-proof, tear-proof and spill-proof paper items that you want to last in the home, office or classroom. These self laminating pouches are great school supplies and office supplies. Use laminate pouches for laminating signs, flyers, schedules, certificates, to-do lists, children’s artwork and other frequently used documents. Most household cleaners are safe to use on these laminator pouches, so you can disinfect them and know your important documents are germ-free (1). One package contains letter-size pouches that fit items up to 8.9 in. x 11.4 in. Each pack contains 100 pouches. For the best results, use these laminating pouches with Scotch Thermal Laminators. When you want to laminate with confidence, choose Scotch Brand. (1) Do not sanitize pouches before the lamination. Test a small amount in a corner before use, especially on important documents. Do not use acetone.