Big Skinny Metro Bi-Fold Slim Wallet, Holds Up to 20 Cards Compact wallet with double clear ID pockets and parallel card storage pockets Holds up to 20 plastic cards; includes billfold area Pockets lined with rubbery coating to prevent cards from sliding out Constructed of thin, light, and durable nylon microfiber; machine washable Measures 3-1/2 x 4-1/16 inches