- You are here:
- Home /
- Graduation Rings /
- Openings Ring
Request a free ring sizer
Size Conversion
| UK, Europe & Australia | United States & Canada | China, Singapore, Japan | Hong Kong | Switzerland | Circumference (mm) | Diameter (mm) |
|---|---|---|---|---|---|---|
| F | 3 | 4 | 6 | 4 | 44.2 | 14.1 |
| F½ |
5 | 5¼ |
44.8 | 14.3 | ||
| G |
3½ |
7.5 | 45.5 | 14.5 | ||
| G½ |
6 | 6½ |
46.1 | 14.7 | ||
| H |
4 | 7 | 9 | 46.8 | 14.9 | |
| H½ |
7¾ |
47.4 | 15.1 | |||
| I | 4½ |
8 | 10 | 48.0 | 15.3 | |
| J | 9 | 48.7 | 15.5 | |||
| J½ |
5 | 9 | 11 | 49.3 | 15.7 | |
| K | 10 | 50.0 | 15.9 | |||
| K½ |
5½ |
10 | 12 | 50.6 | 16.1 | |
| L | 11¾ |
51.2 | 16.3 | |||
| L½ |
6 | 11 | 13 | 12¾ |
51.9 | 16.5 |
| M |
12 | 52.5 | 16.7 | |||
| M½ |
6½ |
13 | 14.5 | 14 | 53.1 | 16.9 |
| N | 53.8 | 17.1 | ||||
| N½ |
7 | 14 | 16 | 15¼ |
54.4 | 17.3 |
| O | 55.1 | 17.5 | ||||
| O½ |
7½ |
15 | 17 | 16½ |
55.7 | 17.7 |
| P |
56.3 | 17.9 | ||||
| P½ |
8 | 16 | 17¾ |
57.0 | 18.1 | |
| 18 | 57.2 | 18.2 | ||||
| Q | 57.6 | 18.3 | ||||
| Q½ |
8½ |
17 | 19 | 58.3 | 18.5 | |
| R | 19 | 58.9 | 18.8 | |||
| R½ |
9 | 18 | 20.5 | 59.5 | 19.0 | |
| S |
20¼ |
60.2 | 19.2 | |||
| S½ |
9½ |
19 | 22 | 60.8 | 19.4 | |
| T |
21½ |
61.4 | 19.6 | |||
| T½ |
10 | 20 | 23 | 62.1 | 19.8 | |
| U | 21 | 62.7 | 20.0 | |||
| U½ |
10½ |
22 | 24 | 22¾ |
63.4 | 20.2 |
| V |
64.0 | 20.4 | ||||
| V½ |
11 | 23 | 25 | 64.6 | 20.6 | |
| W |
25 | 65.3 | 20.8 | |||
| W½ |
11½ |
24 | 27 | 65.9 | 21.0 | |
| X |
66.6 | 21.2 | ||||
| X½ |
12 | 25 | 27.75 | 27½ |
67.2 | 21.4 |
| Y |
67.8 | 21.6 | ||||
| Z | 12½ |
26 | 28¾ |
68.5 | 21.8 | |
| Z½ |
69.1 | 22.0 | ||||
| 13 | 27 | 30 | 69.7 | 22.2 | ||
| Z+1 |
70.4 | 22.4 | ||||
| 13½ |
71.0 | 22.6 | ||||