Wallet is a small flat suitcase, which can be used to carry cash, credit card and ID card (driver's license, ID card, club card, etc.), photo, bus card, gift card, business card and other personal items. And other paper or laminated cards. Wallets are usually made of leather or fabric, usually pocket size, but are not always foldable.

In the early 1950s, with the introduction of the first batch of credit cards, modern two-way wallets with multiple "card slots" became standardized. Some innovations include the introduction of Velcro wallets in the 1970s. Pocket size wallets are still very popular today.