This set of 10 regular storage envelopes is from Hero Arts and is part of the Hero Tools Collection. These envelopes measure 5" x 7", they are made from sturdy, transparent plastic that will last a long time and they have a top closure. These envelopes are perfect for storing 4" x 6" stamp sets, coverplate dies, embossing folders, and many other crafting items. You will love the versatility and the storage options these regular size envelopes provide.