|
|
International Ring Size Conversion Chart
|
| US |
Diam.
Inch |
Diam.
mm |
Circ.
Inch |
Circ.
mm |
UK |
French |
German |
Japan |
Swiss |
| 3 |
35/64 |
14.0 |
1 47/64 |
43.4 |
F |
44 |
14 |
4 |
4 |
| 3 1/2 |
9/16 |
14.4 |
1 25/32 |
44.9 |
G |
|
14 1/2 |
|
|
| 4 |
37/64 |
14.8 |
1
27/32 |
46.5 |
H
1/2 |
|
15 |
7 |
|
| 4 1/2 |
19/32 |
15.2 |
1 57/64 |
47.8 |
I 1/2 |
|
15 1/4 |
8 |
|
| 5 |
5/8 |
15.7 |
1
15/16 |
49.0 |
J
1/2 |
|
15
3/4 |
9 |
|
| 5 1/2 |
41/64 |
16.1 |
1 63/64 |
50.3 |
L |
51 3/4 |
16 |
|
11 3/4 |
| 6 |
21/32 |
16.5 |
2
3/64 |
51.5 |
M |
52
3/4 |
16
1/2 |
12 |
12
3/4 |
| 6 1/2 |
43/64 |
16.9 |
2 3/32 |
52.8 |
N |
54 |
17 |
13 |
14 |
| 7 |
11/16 |
17.3 |
2
9/64 |
54.0 |
O |
55
1/4 |
17
1/4 |
14 |
15
1/4 |
| 7 1/2 |
45/64 |
17.7 |
2 13/64 |
55.3 |
P |
56 1/2 |
17 3/4 |
15 |
16 1/2 |
| 8 |
23/32 |
18.1 |
2
1/4 |
56.6 |
Q |
57
3/4 |
18 |
16 |
17
3/4 |
| 8 1/2 |
47/64 |
18.5 |
2 19/64 |
57.8 |
Q 1/2 |
|
18 1/2 |
17 |
|
| 9 |
3/4 |
18.8 |
2
11/32 |
59.1 |
R 1/2 |
|
19 |
18 |
|
| 9 1/2 |
49/64 |
19.4 |
2 13/32 |
60.6 |
S 1/2 |
|
19 1/2 |
19 |
|
| 10 |
25/32 |
19.8 |
2
29/64 |
62.2 |
T
1/2 |
|
20 |
20 |
|
| 10 1/2 |
51/64 |
20.2 |
2 1/2 |
63.1 |
U 1/2 |
|
20 1/4 |
22 |
22 3/4 |
| 11 |
13/16 |
20.6 |
2
9/16 |
64.3 |
V
1/2 |
|
20
3/4 |
23 |
|
| 11 1/2 |
53/64 |
21.0 |
2 39/64 |
65.7 |
W 1/2 |
|
21 |
24 |
|
| 12 |
27/32 |
21.4 |
2
21/32 |
67.9 |
Y |
67
1/2 |
21
1/4 |
25 |
27
1/2 |
| 12 1/2 |
55/64 |
21.8 |
2 45/64 |
68.5 |
Z |
68 3/7 |
21 3/4 |
26 |
28 3/4 |
| 13 |
7/8 |
22.3 |
2
49/64 |
70.1 |
Z+1 |
|
22 |
27 |
|
| 13 1/2 |
57/64 |
22.6 |
2 51/64 |
71 |
Z+2 |
|
|
|
|
| 14 |
29/32 |
23 |
2
27/32 |
72.5 |
Z+3 |
|
|
|
|
| 14 1/2 |
59/64 |
23.4 |
2 29/32 |
74 |
Z+4 |
|
|
|
|
| 15 |
15/16 |
23.9 |
2
61/64 |
75 |
Z+5 |
|
|
|
|
|
