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 diameter, followed by the die axis. For some Roman coins the ancient name of the denominations are unknown. We don't know the 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.
| 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. For some Roman coins the ancient name of the denominations are unknown. We don't know the 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.
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