What is a dime made of?

The dime is currently the smallest coin in circulating U.S. currency and is made of a cupronickel alloy, consisting of 91.67% copper and 8.33% nickel. It has a diameter of 17.91mm and a thickness of 1.35mm. The obverse (front) of the dime features the portrait of President Franklin D. Roosevelt, and the reverse (back) features a torch surrounded by an olive branch on the left and an oak branch on the right. The dime has been in circulation since 1796, and there have been various designs, including the Barber dime, Mercury dime, and Roosevelt dime.