Size chart
Size chart
Different units of measurement are used to express the circumference of rings in different parts of the world. We bring you an overview of the main units of measurement.
| Diameter (mm) | EU sizes | US sizes | Italy sizes | UK sizes |
|---|---|---|---|---|
| 15.0 | 47.1 | 4 | 7 | H |
| 15.5 | 48.7 | 4 1/2 | 9 | I 1/2 |
| 16.0 | 50.3 | 5 1/4 | 10 | K |
| 16.5 | 51.8 | 6 | 12 | L 1/2 |
| 17.0 | 53.4 | 6 1/2 | 13 | M 1/2 |
| 17.5 | 55.0 | 7 1/4 | 15 | O |
| 18.0 | 56.5 | 8 | 17 | P |
| 18.5 | 58.1 | 8 1/2 | 18 | Q 1/2 |
| 19.0 | 59.7 | 9 1/2 | 20 | S |
| 19.5 | 61.3 | 10 | 21 | T |
| 20.0 | 62.8 | 10 3/4 | 23 | U |
| 20.5 | 64.4 | 11 1/2 | 24 | W |
| 21.0 | 66.0 | 12 | 26 | W 1/2 |
| 21.5 | 67.5 | 12 1/2 | 28 | Y |
| 22.0 | 69.1 | 13 | 29 | Z |
| 22.5 | 70.7 | 13 1/2 | 31 | Z+1 |
| 23.0 | 72.3 | 14 | 32 | Z+2 |
| 23.5 | 73.8 | 14 3/4 | 34 | Z+4 |
| 24.0 | 75.4 | 15 1/4 | 35 | Z+5 |
| 24.5 | 77.0 | 16 | 37 | Z+6 |
| 25.0 | 78.5 | 16 1/2 | 39 | Z+7 |