United States coin diameters (for currently circulating coins) are as follows:
- Penny (1 cent): 19.05 mm (0.750 in)
- Nickel (5 cents): 21.21 mm (0.835 in)
- Dime (10 cents): 17.91 mm (0.705 in)
- Quarter (25 cents): 24.26 mm (0.955 in)
- Half Dollar (50 cents): 30.61 mm (1.205 in)
- Dollar Coin: 26.49 mm (1.043 in)
- The dollar coin’s diameter applies to the Susan B. Anthony, Sacagawea, Presidential, and American Innovation dollars.
- The diameter of a Half Dollar minted between 1971 and the present day is 30.61 mm, according to kennedyhalfdollars.net.
- Historical variations in coin diameters exist. For example, Shield nickels (1866-1883) had a diameter of 20.5 mm.
What coin is 1.5 inches in diameter?
From my experience, The American Creed Medal is a gold-plated coin measuring 1.5 inches in diameter. Composed of copper, it is designed as a medal.