Diameter 101The Diameter of ancient coins is usually expressed in millimeters. In FORVM’s catalog descriptions you will usually find the coin’s weight, then maximum diameter, followed by the die axis. We don't know the ancient denomination names or values of the late Roman bronze coins and refer to them with the following size (diameter) designations: Diameters of Modern Coins for ComparisonSince many Americans are not familiar with millimeters and because it can help anyone visualize size better, we provide comparisons to modern coins below.
p> Inch and Millimeter EquivalentsDivide millimeter measurements by 25.4 to determine the inch measurement.
| Diameter 101The Diameter of ancient coins is usually expressed in millimeters. In FORVM’s catalog descriptions you will usually find the coin’s weight, then maximum diameter, followed by the die axis. We don't know the ancient denomination names or values of the late Roman bronze coins and refer to them with the following size (diameter) designations: Diameters of Modern Coins for ComparisonSince many Americans are not familiar with millimeters and because it can help anyone visualize size better, we provide comparisons to modern coins below.
p> Inch and Millimeter EquivalentsDivide millimeter lenths by 25.4 to determine the inch length.
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