Ring size
Table of international ring sizes
| Austria |
France |
diameter |
Great Britain |
US |
| 40 |
0 |
12,7 |
C |
1.5 |
| 41 |
1 |
13,1 |
D |
2 |
| 42 |
2 |
13,4 |
D½ |
2.5 |
| 43 |
3 |
13,7 |
E½ |
2.75 |
| 44 |
4 |
14 |
F½ |
3 |
| 45 |
5 |
14,3 |
G |
3.5 |
| 46 |
6 |
14,7 |
H |
3.75 |
| 47 |
7 |
15 |
I |
4.25 |
| 48 |
8 |
15,3 |
I½ |
4.5 |
| 49 |
9 |
15,6 |
J½ |
5 |
| 50 |
10 |
16 |
K |
5.25 |
| 51 |
11 |
16,2 |
L |
5.75 |
| 52 |
12 |
16,6 |
M |
6 |
| 53 |
13 |
16,9 |
M½ |
6.5 |
| 54 |
14 |
17,2 |
N½ |
6.75 |
| 55 |
15 |
17,5 |
O½ |
7.25 |
| 56 |
16 |
17,8 |
P |
7.75 |
| 57 |
17 |
18,2 |
Q |
8 |
| 58 |
18 |
18,5 |
Q½ |
8.5 |
| 59 |
19 |
18,8 |
R½ |
8.75 |
| 60 |
20 |
19,1 |
S½ |
9.25 |
| 61 |
21 |
19,4 |
T |
9.5 |
| 62 |
22 |
19,8 |
U |
10 |
| 63 |
23 |
20,1 |
U½ |
10.25 |
| 64 |
24 |
20,4 |
V½ |
10.75 |
| 65 |
25 |
20,7 |
W½ |
11 |
| 66 |
26 |
21 |
X |
11.5 |
| 67 |
27 |
21,3 |
Y |
11.75 |
| 68 |
28 |
21,7 |
Z |
12.25 |
| 69 |
29 |
22 |
Z½ |
12.5 |
| 70 |
30 |
22,3 |
Z+1½ |
13 |
|