| |
Equivalent rings sizes - other countries |
| USA Size |
Diameter |
Diameter |
Circumfurence |
British |
French |
German |
Japanese |
Swiss |
| |
Inches |
Millimeters |
Millimeters |
|
|
|
|
|
| 3 |
0.553 |
14.05 |
44.00 |
F |
44 |
14 |
4 |
4 |
| 3.5 |
0.569 |
14.54 |
45.20 |
|
|
14.5 |
|
|
| 4 |
0.585 |
14.86 |
46.50 |
H1/2 |
|
15 |
7 |
|
| 4.5 |
0.601 |
15.27 |
47.80 |
I1/2 |
|
15.5 |
8 |
|
| 5 |
0.617 |
15.68 |
49.05 |
J1/2 |
|
15.75 |
9 |
|
| 5.5 |
0.634 |
16.10 |
50.00 |
L |
51 3/4 |
|
|
11 3/4 |
| 6 |
0.6550 |
16.51 |
51.50 |
M |
52 3/4 |
16 1/2 |
12 |
12 3/4 |
| 6.5 |
0.666 |
16.92 |
52.80 |
N |
54 |
17 |
13 |
14 |
| 7 |
0.683 |
17.35 |
54.00 |
O |
55 1/4 |
17 1/4 |
14 |
15 1/4 |
| 7.5 |
0.699 |
17.75 |
55.30 |
P |
56 1/2 |
17 3/4 |
15 |
16 1/2 |
| 8 |
0.716 |
18.09 |
56.60 |
Q |
57 3/4 |
18 |
16 |
17 3/4 |
| 8.2 |
0.732 |
18.53 |
57.80 |
|
|
18 1/2 |
17 |
|
| 9 |
0.748 |
18.89 |
59.10 |
|
|
19 |
18 |
|
| 9.5 |
0.764 |
19.41 |
60.30 |
|
|
19 1/2 |
19 |
|
| 10 |
0.781 |
12.84 |
61.60 |
T1/2 |
|
20 |
20 |
|
| 10.5 |
0.797 |
20.20 |
62.80 |
U1/2 |
|
20 1/4 |
22 |
|
| 11 |
0.814 |
20.68 |
64.10 |
V1/2 |
|
20 3/4 |
23 |
|
| 11.5 |
0.843 |
21.08 |
65.30 |
|
|
21 |
24 |
|
| 12 |
0.846 |
21.49 |
66.60 |
Y |
67 1/2 |
21 1/4 |
25 |
27 1/2 |
| 12.5 |
0.862 |
21.89 |
67.90 |
Z |
68 3/4 |
21 3/4 |
26 |
28 3/4 |
| 13 |
0.879 |
22.33 |
69.10 |
|
|
22 |
27 |
|
| |
|
|
|
|
|
|
|
|
MY ACCOUNT 
