International ring sizes
Baltic,Germany,Russia,Ukrain and most Ex-USSR (∅ mm.) | USA, Canada(approx) | Great Britain(approx) | Switzerland(approx) | France(approx) | India(approx) | Japan(approx) |
15 | 4¼ | H½ | 7.5 | 47.4 | 7 | 7.5 |
15.5 | 4¾ | J | 8.75 | 48.7 | 9 | 8.5 |
16 | 5½ | K½ | 10.5 | 50.6 | 10.5 | 10 |
16.5 | 6 | L½ | 11.75 | 51.9 | 12 | 11 |
17 | 6½ | M½ | 13.25 | 53.1 | 13 | 13 |
17.5 | 7¼ | O | 15 | 55.1 | 15 | 14.5 |
18 | 7¾ | P | 16.25 | 56.3 | 16 | 15.5 |
18.5 | 8½ | Q½ | 18.25 | 58.3 | 18 | 17 |
19 | 9 | R½ | 19.5 | 59.5 | 19.5 | 18 |
19.5 | 9¾ | T | 21.5 | 61.4 | 21.5 | 19.5 |
20 | 10¼ | U | 22.75 | 62.7 | 23 | 21 |
20.5 | 11 | V½ | 24.75 | 64.6 | 25 | 23 |
21 | 11½ | W½ | 26 | 65.9 | 26 | 24 |
21.5 | 12¼ | Y | 27.75 | 67.8 | 28 | 25.5 |
22 | 12¾ | Z½ | 29 | 69.1 | 29 | 26.5 |
22.5 | 13¼ | Z1 | 30.5 | 70.4 | ||
23 | 14 | Z3 | 32.25 | 72.3 |