small, flat case or pouch that is used to carry personal items such as cash

A wallet is a small flat container, mostly of leather or fabric, that a person uses to hold cash, credit cards, identification cards, etc. Most men usually keep their wallets in their pockets, while women usually keep them in larger bags called purses.

A kind of wallet: inside view.
Wrist wallet

Wallets, particularly in Europe, where larger coins are prevalent, contain also a coin purse compartments. Some wallets have built-in clasps or bands to keep them closed.

As European banknotes, such as Euros and Pounds, are typically larger than American banknotes in size, they do not fit in some smaller American wallets.

A cryptocurrency wallet is a device, program, or service that stores public and/or private keys for cryptocurrency transactions. In addition to this basic function, a cryptocurrency wallet most often also offers provides encryption and/or the use of a digital signature.

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