Us Dime Dimensions: Complete Specifications Guide for Makers and 3D Modeling
By Alexander Ross
The United States Mint enforces rigorous physical metrics for circulating coinage under federal statute. First struck in 1946 to honor President Franklin D. Roosevelt, the ten-cent piece remains the smallest diameter coin currently produced by the United States Mint, measuring smaller than both the penny and the nickel.
Every standard cupronickel circulation dime minted since 1965 adheres to a diameter of 17.91 mm (0.705 inches). Its overall rim height measures 1.35 mm (0.053 inches), while the coin's mass sits at precisely 2.268 grams, equivalent to 0.080 avoirdupois ounces or 35.0 grains. In volume calculations, an uncirculated specimen displaces approximately 340 cubic millimeters (0.340 cm³) of fluid.
Its metallurgical profile dictates its magnetic and density behavior. Modern dimes utilize a clad structure composed of an outer sandwich layer of 75% copper and 25% nickel bonded metallurgically to an inner core of 100% pure copper. Across the entire unit, the aggregate breakdown balances out to 91.67% copper and 8.33% nickel. This specific alloy mix gives the dime its characteristic silver-gray luster while resisting severe atmospheric corrosion.
Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.
