| United States and Canada ring size |
Diameter in inches |
Great Britain |
France |
Germany |
Japan |
Switzer-
land |
| 000 |
0.390 |
- |
- |
- |
- |
- |
| 00 |
0.422 |
- |
- |
- |
- |
- |
| 0 |
0.454 |
- |
- |
- |
- |
- |
| � |
0.462 |
A |
- |
- |
- |
- |
| � |
0.471 |
A-� |
- |
- |
- |
- |
| 1 |
0.487 |
B |
- |
- |
1 |
- |
| 1 1/4 |
0.495 |
B-� |
- |
- |
- |
- |
| 1 1/2 |
0.503 |
C |
- |
- |
- |
- |
| 1 3/4 |
0.511 |
C-� |
- |
- |
- |
- |
| 2 |
0.520 |
D |
41 1/2 |
13 1/4 |
2 |
1 1/2 |
| 2 1/4 |
0.528 |
D-� |
42 1/8 |
13 1/2 |
- |
- |
| 2 1/2 |
0.536 |
E |
42 3/4 |
13 3/4 |
3 |
2 3/4 |
| 2 3/4 |
0.544 |
E-� |
43 3/8 |
- |
- |
3 3/8 |
| 3 |
0.553 |
F |
44 |
14 |
4 |
4 |
| 3 1/4 |
0.561 |
F-� |
44 5/8 |
14 1/4 |
- |
4 5/8 |
| 3 1/2 |
0.569 |
G |
45 1/4 |
14 1/2 |
5 |
5 1/4 |
| 3 3/4 |
0.577 |
G-� |
45 7/8 |
14 3/4 |
6 |
5 7/8 |
| 4 |
0.586 |
H-� |
46 1/2 |
15 |
7 |
6 1/2 |
| 4 1/4 |
0.594 |
I |
47 1/8 |
15 1/4 |
- |
7 1/8 |
| 4 1/2 |
0.602 |
I-� |
47 3/4 |
15 1/2 |
8 |
7 3/4 |
| 4 3/4 |
0.610 |
J |
48 3/8 |
- |
- |
8 3/8 |
| 5 |
0.619 |
J-� |
49 |
15 3/4 |
9 |
9 |
| 5 1/4 |
0.627 |
K |
49 5/8 |
16 |
- |
9 5/8 |
| 5 1/2 |
0.635 |
K-� |
50 1/4 |
16 1/4 |
10 |
10 1/4 |
| 5 3/4 |
0.643 |
L |
50 7/8 |
- |
11 |
10 7/8 |
| 6 |
0.652 |
L-� |
51 1/2 |
16 1/2 |
12 |
11 1/2 |
| 6 1/4 |
0.660 |
M |
52 1/8 |
16 3/4 |
- |
12 1/8 |
| 6 1/2 |
0.668 |
M-� |
52 3/4 |
17 |
13 |
12 3/4 |
| 6 3/4 |
0.676 |
N |
53 3/8 |
- |
- |
13 3/8 |
| 7 |
0.685 |
O |
54 |
17 1/4 |
14 |
14 |
| 7 1/4 |
0.693 |
O-� |
54 5/8 |
17 1/2 |
- |
14 5/8 |
| 7 1/2 |
0.701 |
P |
55 1/4 |
17 3/4 |
15 |
15 1/4 |
| 7 3/4 |
0.709 |
P-� |
55 7/8 |
- |
- |
15 7/8 |
| 8 |
0.717 |
Q |
56 1/2 |
18 |
16 |
16 1/2 |
| 8 1/4 |
0.726 |
Q-� |
57 1/8 |
18 1/4 |
- |
17 1/8 |
| 8 1/2 |
0.734 |
R |
57 3/4 |
18 1/2 |
17 |
17 3/4 |
| 8 3/4 |
0.742 |
R-� |
58 3/8 |
18 3/4 |
- |
18 3/8 |
| 9 |
0.750 |
S |
59 |
19 |
18 |
19 |
| 9 1/4 |
0.759 |
S-� |
59 5/8 |
19 1/4 |
- |
19 5/8 |
| 9 1/2 |
0.767 |
- |
60 1/4 |
19 1/2 |
19 |
20 1/4 |
| 9 3/4 |
0.775 |
T |
60 7/8 |
19 3/4 |
- |
20 7/8 |
| 10 |
0.783 |
T-� |
61 1/2 |
20 |
20 |
21 1/2 |
| 10 1/4 |
0.792 |
U |
62 1/8 |
20 1/4 |
21 |
22 1/8 |
| 10 1/2 |
0.800 |
U-� |
62 3/4 |
20 1/2 |
22 |
22 3/4 |
| 10 3/4 |
0.808 |
V |
63 3/8 |
- |
- |
23 3/8 |
| 11 |
0.816 |
V-� |
64 |
20 3/4 |
23 |
24 |
| 11 1/4 |
0.825 |
W |
64 5/8 |
- |
- |
24 5/8 |
| 11 1/2 |
0.833 |
W-� |
65 1/4 |
21 |
24 |
25 1/4 |
| 11 3/4 |
0.841 |
X |
65 7/8 |
- |
25 7/8 |
| 12 |
0.849 |
Y |
66 1/2 |
21 1/4 |
25 |
26 1/2 |
| 12 1/4 |
0.858 |
Y-� |
67 1/8 |
21 1/2 |
- |
27 1/8 |
| 12 1/2 |
0.866 |
Z |
67 3/4 |
21 3/4 |
26 |
27 3/4 |
| 12 3/4 |
0.874 |
Z-� |
68 3/8 |
- |
- |
28 3/8 |
| 13 |
0.882 |
- |
69 |
22 |
27 |
29 |
|
