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| Choose the Ring Size you need |
| American Size (Approx.) |
UK Size (Approx.) |
European Size (Approx.) |
chinese Size (Approx.) |
Inside Diameter (mm) |
| 5 |
J |
49 |
11 |
15.40 |
| 5.5 |
J 1/2 |
50 |
12 |
15.81 |
| 6 |
L |
51 |
13 |
16.23 |
| 6.5 |
M |
53 |
14 |
16.68 |
| 7 |
N |
54 |
15 |
17.09 |
| 7.5 |
O |
55 |
16 |
17.52 |
| 8 |
P |
56 |
17 |
17.90 |
| 8.5 |
P 1/2 |
58 |
18 |
18.28 |
| 9 |
R |
59 |
19 |
18.69 |
| 9.5 |
S |
60 |
20 |
19.12 |
| 10 |
T |
62 |
21 |
19.55 |
| 10.5 |
U 1/2 |
63 |
22 |
20.05 |
| 11 |
V 1/2 |
64 |
23 |
20.37 |
| 11.5 |
W |
66 |
24 |
20.83 |
| 12 |
X 1/2 |
67 |
25 |
21.32 |
| 12.5 |
Y 1/2 |
68 |
26 |
21.65 |
| 13 |
Z 1/2 |
69 |
27 |
22.10 |
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