The United States Coin is a form of currency used in the United States. It consists of three coins: the NICKEL, the DIME, and the CENT. The NICKEL is a five-CENT coin, the DIME is a ten-CENT coin, and the CENT is a one-CENT coin. All three coins are made of a copper-NICKEL alloy and feature the profile of a former president on the obverse side. The NICKEL has a diameter of 21.21mm, the DIME has a diameter of 17.91mm, and the CENT has a diameter of 19.05mm.