Pack of 50. They are archival safe and are made of a clear/transparent 4 mil plastic. Securely store your clear stamps, wafer thin dies, stencils, embossing folders and more! The pockets are a great way to store your Avery Elle clear photopolymer stamp sets and custom steel dies. Each pocket will fit one standard 4x6" clear stamp set or two 4x3" clear stamp sets. Store the pockets in a CD/DVD storage basket or clip them up if you wish. Each pocket measures 5-1/2” x 7-1/4” and includes a flap that tucks in to keep your stamps and dies secure in the pocket. For greater stability, consider taking the stamp set out of the retail packaging and tape it to a sheet of card stock. Slide the stamp set/card stock sheet into the pocket.