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International Ring Size Conversion Table
US & Canada |
UK & Australian |
French & Russian |
German |
Japanese |
Swiss |
3 |
F - F 1/2 |
44 |
14 |
4 |
4 |
3.25 |
F 3/4 - G |
45 |
- |
5 |
5 |
3.5 |
G 1/4 - G 1/2 |
- |
14 1/2 |
6 |
5.5 |
3.75 |
H - H 1/4 |
46 |
- |
- |
6 |
4 |
H 1/2 - H 3/4 |
- |
15 |
7 |
7 |
4.25 |
I - I 1/4 |
47 |
- |
- |
- |
4.5 |
I 1/2 - J |
48 |
- |
8 |
8 |
4.75 |
J 1/4 |
49 |
15 1/2 |
- |
9 |
5 |
J 1/2 - K |
- |
- |
9 |
- |
5.25 |
K 1/4 - K 1/2 |
50 |
- |
10 |
10 |
5.5 |
K 3/4 - L |
51 |
16 |
- |
11 |
5.75 |
L 1/4 - L 1/2 |
- |
- |
11 |
- |
6 |
L 3/4 - M 1/4 |
52 |
16 1/2 |
12 |
12 |
6.25 |
M 1/2 - M 3/4 |
53 |
- |
- |
13 |
6.5 |
N - N 1/4 |
- |
17 |
13 |
14 |
6.75 |
N 1/2 - N 3/4 |
54 |
- |
- |
- |
7 |
O - O 1/4 |
- |
- |
14 |
- |
7.25 |
O 1/2 - O 3/4 |
55 |
17 1/2 |
- |
15 |
7.5 |
P - P 1/4 |
56 |
- |
15 |
16 |
7.75 |
P 1/2 - P 3/4 |
- |
- |
- |
- |
8 |
Q - Q 1/4 |
57 |
18 |
16 |
17 |
8.25 |
Q 1/2 |
58 |
- |
- |
18 |
8.5 |
Q 3/4 - R |
- |
18 1/2 |
17 |
- |
8.75 |
R 1/4 - R 1/2 |
59 |
- |
- |
19 |
9 |
R 3/4 - S |
- |
19 |
18 |
- |
9.25 |
S 1/4 - S 1/2 |
60 |
- |
- |
20 |
9.5 |
S 3/4 - T |
61 |
19 1/2 |
19 |
21 |
9.75 |
T 1/4 |
62 |
- |
- |
- |
10 |
T 1/2 - T 3/4 |
- |
20 |
20 |
22 |
10.25 |
U - U 1/4 |
63 |
- |
21 |
23 |
10.5 |
U 1/2 - V |
- |
- |
22 |
- |
10.75 |
V 1/4 |
64 |
20 1/2 |
- |
24 |
11 |
V 1/2 - W |
65 |
- |
23 |
- |
11.25 |
W 1/4 - W 1/2 |
66 |
- |
- |
25 |
11.5 |
W 3/4 - X |
- |
21 |
24 |
26 |
11.75 |
X 1/4 - X 1/2 |
67 |
- |
- |
- |
12 |
Y - Y 1/4 |
- |
21 1/2 |
25 |
27 |
12.25 |
Y 1/2 - Y 3/4 |
68 |
- |
- |
28 |
12.5 |
Z - Z 1/4 |
69 |
- |
26 |
- |
12.75 |
Z+1/2 - Z+3/4 |
- |
22 |
- |
29 |
13 |
Z+1 |
70 |
- |
27 |
30 |
13.25 |
- |
- |
- |
- |
- |
13.5 |
Z+1.5 |
71 |
22 1/2 |
- |
31 |
13.75 |
Z+2 |
- |
- |
- |
32 |
14 |
Z+3 |
72 |
23 |
- |
- |
14.25 |
- |
73 |
- |
- |
33 |
14.5 |
Z+4 |
- |
23 1/2 |
- |
- |
14.75 |
- |
74 |
- |
- |
34 |
15 |
Z+5 |
75 |
24 |
- |
35 |
15.5 |
Z+6 |
- |
24 1/1 |
- |
36 |
16 |
Z+7 |
- |
- |
- |
37 |