This set of 10 small storage envelopes is from Hero Arts and is part of the Hero Tools Collection. These envelopes are designed to hold small clear or cling stamps and a 3" x 4" stamp set will fit perfectly inside. There are ten 4" x 5" plastic envelopes in this package that have a top closure and are made from sturdy, transparent plastic that will last a long time. These small envelopes can also be used for storing small die cuts ephemera, small stickers, embellishments of all kinds, and other thinner crafting items.