Small, flat case or pouch that is used to carry personal items such as cash, business cards, etc
A wallet is a flat case or pouch, often used to carry small personal items such as physical currency, debit cards, and credit cards; identification documents such as driving licence, identification card, club card; photographs, transit pass, business cards and other paper or laminated cards. Wallets are generally made of fabric or leather, and they are usually pocket-sized and foldable. Wallets may include a money clip, coin purse, chain fastener, strap, snap, rein, or zipper. There are specialized wallets for holding passports, wearable ID cards, and checkbooks.
https://en.wikipedia.org/wiki/Wallet