When buying rings online or ordering custom-made rings, it's vital to ensure you choose the right ring size. That's why we've produced these handy international ring size charts & tools below, cross referencing ring sizes in different international markets.
Ring Size Chart:
All sizes are approximate equivalents |
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USA & Canadian Standard |
Inside Diameter |
Inside Circumference |
Equivalents |
|||
Ring Sizes |
mm / inches |
mm / inches |
Ireland, British & Australia |
French |
German |
Japanese |
1½ |
12.78 / .503 |
40.2 / 1.580 |
C |
40½ |
12¾ |
— |
2 |
13.21 / .520 |
41.5 / 1.634 |
D |
41½ |
13¼ |
2 |
2½ |
13.61 / .536 |
42.7 / 1.684 |
E |
42¾ |
13¾ |
3 |
3 |
14.04 / .553 |
44.0 / 1.739 |
F |
44 |
14 |
4 |
3½ |
14.45 / .569 |
45.2 / 1.788 |
G |
45¼ |
14½ |
— |
4 |
14.86 / .585 |
46.5 / 1.836 |
H½ |
46½ |
15 |
7 |
4½ |
15.27 / .601 |
47.8 / 1.888 |
I½ |
47¾ |
15¼ |
8 |
5 |
15.70 / .618 |
49.0 / 1.941 |
J½ |
49 |
15¾ |
9 |
5½ |
16.10 / .634 |
50.2 / 1.992 |
L |
50¼ |
16 |
— |
6 |
16.51 / .650 |
51.5 / 2.042 |
M |
51½ |
16½ |
12 |
6¼ |
N/A |
N/A |
M ½ |
N/A |
N/A |
N/A |
6½ |
16.92 / .666 |
52.8 / 2.092 |
N |
52¾ |
17 |
13 |
7 |
17.35 / .683 |
54.0 / 2.146 |
N½ |
54 |
17¼ |
14 |
7½ |
17.63 / .699 |
55.3 / 2.196 |
O½ |
55½ |
17½ |
15 |
8 |
18.19 / .716 |
56.6 / 2.249 |
P½ |
56¾ |
18 |
16 |
8½ |
18.59 / .732 |
57.8 / 2.300 |
Q½ |
58 |
18½ |
17 |
9 |
18.99 / .748 |
59.1 / 2.350 |
R½ |
59¼ |
19 |
18 |
9½ |
19.41 / .764 |
60.3 / 2.400 |
S½ |
60½ |
19½ |
19 |
10 |
19.84 / .781 |
61.6 / 2.463 |
T½ |
61¾ |
20 |
20 |
10½ |
20.24 / .797 |
62.8 / 2.504 |
U½ |
62¾ |
20¼ |
22 |
11 |
20.68 / .814 |
64.1 / 2.567 |
V½ |
64¼ |
20¾ |
23 |
11½ |
21.01 / .830 |
66.0 / 2.608 |
W½ |
66 |
21 |
24 |
12 |
21.41 / .846 |
67.3 / 2.658 |
Y |
67¼ |
21½ |
25 |