Ring Size Guide
Below is a chart which lists British, European, Japanese, and American systems size by side
Sizes by "leading edge" rather than "middle". Diameter = Internal diameter in millimetres. Circumference = Internal circumference in millimetres.
| Ring Size UK |
Measurement (mm) |
USA Size |
| D |
41 |
2 |
| E |
43 |
2.5 |
| F |
44 |
3 |
| G |
45 |
3.5 |
| H |
46 |
4 |
| I |
47 |
4.5 |
| J |
49 |
5 |
| K |
50 |
5.5 |
| L |
51 |
6 |
| M |
52 |
6.5 |
| N |
54 |
7 |
| O |
55 |
7.5 |
| P |
56 |
8 |
| Q |
57 |
8.5 |
| R |
59 |
9 |
| S |
60 |
9.5 |
| T |
61 |
10 |
| U |
62 |
10.5 |
| V |
63 |
11 |
| W |
65 |
11.5 |
| X |
66 |
12 |
| Y |
67 |
12.5 |
| Z |
69 |
13 |
| Z+1 |
70 |
13.5 |
| Z+2 |
71 |
14 |
| Z+3 |
73 |
14.5 |