These envelopes are a surefire way to get you organized at home, work or on-the-go! They're index card-sized so can be tucked away inside a bag, suitcase or drawer without taking up too much space. And they offer the perfect amount of room for storing index cards, coupons, receipts, stamps, photos or small-sized paperwork. Made from high quality plastic that's durable and scratch-resistant and have a straight flap that can be opened and closed with a secure button-and-string closure. Plus, each envelope has a helpful 1" expansion! Details:Black5.5" x 7.5" each12 envelopesPlasticIndex card-sized