Hero Tools Regular Magnet Sheets & Storage Envelopes (10)The perfect way to store your stamps and dies. The transparent plastic envelope has a top closure, made with sturdy construction and is long lasting. The magnetic sheet keeps your metal dies securely organized. Includes ten 5? x 7? envelopes, each with a 4. 25? x 6. 25? magnetic sheets inside. Ideal for storing 4? x 6? clear stamp sets with coordinating dies, or larger dies on their own.