The one tenth of a dollar coin known as the dime, was another coin like the half dime that was authorized by the Coinage Act of 1792. Here’s a few facts about the dime. It weighs 2.268 grams, has a diameter of 17.91 mm. and a thickness of 1.35 mm. And just in case you’re ever on Jeopardy, you’ll know that on the edge it has 118 reeds if the answer comes up. And it was produced over the years in theses designs: Draped Bust (1796–1807), Capped Bust (1809–1837), Seated Liberty (1837–1891), Barber (1892–1916), Winged Liberty Head (“Mercury”) (1916–1945), and Franklin D. Roosevelt (1946–present).