Bi-fold wallet: a type of wallet in which the bills are folded over once. This has become the "standard" wallet. Credit cards and identification cards may be stored horizontally or vertically.
Some wallets, particularly in Europe (where larger denominated coins are more prevalent) contain a coin purse compartment. Some wallets have built-in clasps or bands to keep them closed. As European bills (pounds, euros) are larger than American bills in one dimension, they don't fit in some smaller American wallets.
