Ring Sizes
Find Your Ring Size
Discovering your ring size is easy! Simply get hold of an existing ring that fits and, holding the ring side-on, take the INTERNAL diameter measurement in mm (i.e. the left-to-right measurement of the hole) and equate it to the chart below.
| British |
US Size |
Diameter (inch) |
Diameter (mm) |
Metric - MM |
French |
German |
Japanese |
Swiss |
| I |
4 1/4 |
- |
15.04 |
47.1 |
47 3/4 |
|
|
7 3/4 |
| J |
4 5/8 |
- |
15.4 |
48.1 |
49 |
15 1/2 |
|
9 |
| K |
5 1/8 |
- |
15.8 |
49.3 |
50 |
|
|
10 |
| L |
5 1/2 |
0.634 |
16.1 |
50.3 |
51 3/4 |
16 |
|
11 3/4 |
| M |
6 |
0.65 |
16.51 |
51.5 |
52 3/4 |
16 1/2 |
12 |
12 3/4 |
| N |
6 1/2 |
0.666 |
16.92 |
52.8 |
54 |
17 |
13 |
14 |
| O |
7 |
0.683 |
17.35 |
54 |
55 1/4 |
17 1/4 |
14 |
15 1/4 |
| P |
7 1/2 |
0.699 |
17.75 |
55.3 |
56 1/2 |
17 3/4 |
15 |
16 1/2 |
| Q |
8 |
0.716 |
18.19 |
56.6 |
57 3/4 |
18 |
16 |
17 3/4 |
| R |
8 5/8 |
- |
18.61 |
58.4 |
59 |
|
|
19 |
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Please note: Your finger size can change throughout the day, so it is a good idea to measure at the end of the day when your fingers are at their largest. Do not measure when your hands are cold; your fingers will be at least half a size smaller.