Ring Size Chart
All Hamilton & Young Rings use the U.S. Sizing, ranging between Sizes 5 - 12.
There are not always ½ sizes available, so we recommend you 'Round Up' for the correct fit.
Please see the comparison chart below to convert your correct size.
| Size (mm) | Diameter (mm) | AUS/GB size | French Size | German Size | Italian Size | U.S Size |
| 48 | 15.3 | I 1/2 | -- | 15.25 | 8 | 4 1/2 |
| 49 | 15.7 | J 1/2 | -- | 15.75 | 9.5 | 5 |
| 51 | 16.1 | L | 51 3/4 | 16 | 10.5 | 5 1/2 |
| 52 | 16.5 | M | 52 3/4 | 16.5 | 11.5 | 6 |
| 53 | 16.9 | N | 54 | 17 | 13 | 6 1/2 |
| 55 | 17.4 | O | 55 1/4 | 17.25 | 14.5 | 7 |
| 56 | 17.8 | P | 56 1/2 | 17.75 | 16 | 7 1/2 |
| 57 | 18.2 | Q | 57 3/4 | 18 | 17 | 8 |
| 58 | 18.5 | Q 1/2 | 58 | 18.5 | 18.5 | 8 1/2 |
| 59 | 18.9 | R 1/2 | 59 1/4 | 19 | 19.5 | 9 |
| 61 | 19.4 | S 1/2 | 60 1/2 | 19.5 | 21 | 9 1/2 |
| 62 | 19.9 | T 1/2 | 61 3/4 | 20 | 22 | 10 |
| 63 | 20.2 | U 1/2 | 62 3/4 | 20.25 | 23.5 | 10 1/2 |
| 65 | 20.7 | V 1/2 | 64 1/4 | 20.75 | 25 | 11 |
| 66 | 21.1 | W 1/2 | 66 | 21 | 26.5 | 11 1/2 |
| 68 | 21.5 | Y | 67 1/2 | 21.25 | 27.5 | 12 |
| 69 | 21.9 | Z | 68 3/4 | 21.75 | 28.5 | 12 1/2 |
| 70 | 22.3 | Z+1 | -- | 22 | 30 | 13 |
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