Ring size conversion chart
|
Inside Diameter (mm) |
Inside circumference (mm) |
US |
UK |
Spain / Italy |
Japan / China |
|
16 |
50.2 |
5.5 |
K |
10,5 |
10 |
|
16.5 |
51.9 |
6 |
L½ |
12 |
11 |
|
16.9 |
53 |
6.5 |
M½ |
13,5 |
13 |
|
17.3 |
54.4 |
7 |
N½ |
14,5 |
14 |
|
17.7 |
55.7 |
7.5 |
P |
16 |
15 |
|
18.1 |
57 |
8 |
Q |
17 |
16 |
|
18.5 |
58.3 |
8.5 |
R |
18,5 |
17 |
|
18.9 |
59.5 |
9 |
S |
20 |
18 |
|
19.4 |
61 |
9.5 |
T |
21 |
19 |
|
19.8 |
62.2 |
10 |
U |
22,5 |
20 |
|
20.2 |
63.4 |
10.5 |
V |
23,5 |
22 |
|
20.6 |
64.7 |
11 |
W |
25 |
23 |
|
21 |
66 |
11.5 |
W¾ |
26 |
24 |
|
21.4 |
67.2 |
12 |
Y |
27,5 |
25 |
|
21.8 |
68.5 |
12.5 |
Z |
29 |
26 |
|
22.2 |
69.7 |
13 |
Z+1 |
30 |
27 |
|
23 |
72.2 |
14 |
Z+3 |
33 |
- |
|
24 |
75.4 |
15 |
Z+4 |
35 |
- |