Size Chart
Use the following sizing chart to find the perfect fit for your ring:
| Circumference (mm) |
Diameter (mm) |
HK |
US |
UK |
JAPAN |
| 44.3 |
14.1 |
6 |
3 |
F |
4 |
| 45.5 |
14.3 |
7 |
3.25 |
F 1/2 |
5 |
| 46.5 |
14.7 |
8 |
3.75 |
G |
6 |
| 47.7 |
14.9 |
9 |
4 |
H |
7 |
| 48.7 |
15.3 |
10 |
4.5 |
I |
8 |
| 49.9 |
15.7 |
11 |
5 |
J 1/2 |
9 |
| 50.9 |
16.1 |
12 |
5.5 |
K 1/2 |
10 |
| 52.1 |
16.5 |
13 |
6 |
L1/2 |
11 |
| 53.1 |
16.7 |
14 |
6.25 |
M |
12 |
| 54.3 |
17.1 |
15 |
6.75 |
N |
13.5 |
| 55.6 |
17.3 |
16 |
7 |
N 1/2 |
14 |
| 56.5 |
17.7 |
17 |
7.5 |
O 1/2 |
15 |
| 57.5 |
18.2 |
18 |
8 |
P 1/2 |
16.25 |
| 58.7 |
18.5 |
19 |
8.5 |
Q 1/2 |
17 |
| 59.7 |
18.8 |
20 |
9.25 |
R |
17.5 |
| 60.9 |
19.1 |
21 |
9.5 |
S |
18 |
| 61.9 |
19.4 |
22 |
9.75 |
S 1/2 |
19 |
| 63.1 |
19.8 |
23 |
10 |
T 1/2 |
20 |
| 64.1 |
20.2 |
24 |
10.5 |
U 1/2 |
22 |
| 65.3 |
20.6 |
25 |
11 |
V 1/2 |
23 |
| 66.3 |
21 |
26 |
11.5 |
W1/2 |
24 |
| 67.5 |
21.2 |
27 |
12 |
X |
24.5 |
| 68.5 |
21.6 |
28 |
12.25 |
Y |
25.5 |
| 69.7 |
22 |
29 |
12.5 |
Z1/2 |
26.5 |
| Diameter (mm) |
Circumference (mm) |
United States & Canada |
Australia, UK & Ireland |
Europe |
Spain & Italy |
Japan |
| 14.1 |
44.3 |
3 |
F |
44 |
4 |
4 |
| 14.5 |
45.6 |
3.5 |
G |
45 |
5.5 |
6 |
| 14.9 |
46.8 |
4 |
H |
47 |
7 |
7 |
| 15.3 |
48.1 |
4.5 |
I |
48 |
9 |
8 |
| 15.7 |
49.3 |
5 |
J 1/2 |
50 |
10 |
9 |
| 16.1 |
50.6 |
5.5 |
K 1/2 |
52 |
12 |
10 |
| 16.5 |
51.9 |
6 |
L 1/2 |
53 |
13 |
11 |
| 16.7 |
52.5 |
一 |
一 |
一 |
一 |
12 |
| 16.9 |
53.1 |
6.5 |
M 1/2 |
54 |
14 |
13 |
| 17.3 |
54.4 |
7 |
N 1/2 |
55 |
15 |
14 |
| 17.7 |
55.6 |
7.5 |
O 1/2 |
56 |
16.5 |
15 |
| 18.1 |
56.9 |
8 |
P 1/2 |
57 |
18 |
16 |
| 18.5 |
58.1 |
8.5 |
Q 1/2 |
58 |
19 |
17 |
| 18.8 |
59.1 |
一 |
一 |
一 |
一 |
18 |
| 19 |
59.7 |
9 |
R 1/2 |
59 |
20 |
一 |
| 19.4 |
61 |
9.5 |
S 1/2 |
60 |
21.5 |
19 |
| 19.8 |
62.2 |
10 |
T 1/2 |
61 |
22 |
20 |
| 20 |
62.9 |
一 |
一 |
一 |
一 |
21 |
| 20.2 |
63.5 |
10.5 |
U 1/2 |
62 |
23.5 |
22 |
| 20.6 |
64.7 |
11 |
V 1/2 |
63 |
25 |
23 |
| 21 |
66.0 |
11.5 |
W 1/2 |
64 |
26 |
24 |
| 21.4 |
67.2 |
12 |
X 1/2 |
66 |
27.5 |
一 |
| 21.5 |
67.6 |
一 |
一 |
一 |
一 |
25 |
| 21.6 |
67.9 |
一 |
一 |
68 |
一 |
一 |
| 21.8 |
68.5 |
12 |
一 |
一 |
一 |
一 |
