Below is a complete international conversion chart for jewelry rings. Gold rings can be resized but if it is bezel set please ask the seller first to make sure they can re size. Most silver rings are to expensive to re size size so please check your ring ring on this chart.
Inside diameter |
Inside circumference |
Sizes |
|||||
(in) |
(mm) |
(in) |
(mm) |
United States and Canada |
United Kingdom, Ireland, and Australia |
Japan |
Switzerland |
0.458 |
11.63 |
1.44 |
36.5 |
0 |
|||
0.466 |
11.84 |
1.46 |
37.2 |
1/4 |
|||
0.474 |
12.04 |
1.49 |
37.8 |
1/2 |
A |
||
0.482 |
12.24 |
1.51 |
38.5 |
3/4 |
A 1/2 |
||
0.49 |
12.45 |
1.54 |
39.1 |
1 |
B |
1 |
|
0.498 |
12.65 |
1.56 |
39.7 |
1 1/4 |
B 1/2 |
||
0.506 |
12.85 |
1.59 |
40.4 |
1 1/2 |
C |
||
0.514 |
13.06 |
1.61 |
41.0 |
1 3/4 |
C 1/2 |
||
0.522 |
13.26 |
1.64 |
41.7 |
2 |
D |
2 |
1.5 |
0.53 |
13.46 |
1.67 |
42.3 |
2 1/4 |
D 1/2 |
||
0.538 |
13.67 |
1.69 |
42.9 |
2 1/2 |
E |
3 |
2.75 |
0.546 |
13.87 |
1.72 |
43.6 |
2 3/4 |
E 1/2 |
||
0.554 |
14.07 |
1.74 |
44.2 |
3 |
F |
4 |
4 |
0.562 |
14.27 |
1.77 |
44.8 |
3 1/4 |
F 1/2 |
5 |
5.25 |
0.57 |
14.48 |
1.79 |
45.5 |
3 1/2 |
G |
||
0.578 |
14.68 |
1.82 |
46.1 |
3 3/4 |
G 1/2 |
6 |
6.5 |
0.586 |
14.88 |
1.84 |
46.8 |
4 |
H |
7 |
|
0.594 |
15.09 |
1.87 |
47.4 |
4 1/4 |
H 1/2 |
7.75 |
|
0.602 |
15.29 |
1.89 |
48.0 |
4 1/2 |
I |
8 |
|
0.61 |
15.49 |
1.92 |
48.7 |
4 3/4 |
J |
9 |
|
0.618 |
15.70 |
1.94 |
49.3 |
5 |
J 1/2 |
9 |
|
0.626 |
15.90 |
1.97 |
50.0 |
5 1/4 |
K |
10 |
|
0.634 |
16.10 |
1.99 |
50.6 |
5 1/2 |
K 1/2 |
10 |
|
0.642 |
16.31 |
2.02 |
51.2 |
5 3/4 |
L |
11.75 |
|
0.65 |
16.51 |
2.04 |
51.9 |
6 |
L 1/2 |
11 |
12.75 |
0.658 |
16.71 |
2.07 |
52.5 |
6 1/4 |
M |
12 |
|
0.666 |
16.92 |
2.09 |
53.1 |
6 1/2 |
M 1/2 |
13 |
14 |
0.674 |
17.12 |
2.12 |
53.8 |
6 3/4 |
N |
||
0.682 |
17.32 |
2.14 |
54.4 |
7 |
N 1/2 |
14 |
15.25 |
0.69 |
17.53 |
2.17 |
55.1 |
7 1/4 |
O |
||
0.698 |
17.73 |
2.19 |
55.7 |
7 1/2 |
O 1/2 |
15 |
16.5 |
0.706 |
17.93 |
2.22 |
56.3 |
7 3/4 |
P |
||
0.714 |
18.14 |
2.24 |
57.0 |
8 |
P 1/2 |
16 |
17.75 |
0.722 |
18.34 |
2.27 |
57.6 |
8 1/4 |
Q |
||
0.73 |
18.54 |
2.29 |
58.3 |
8 1/2 |
Q 1/2 |
17 |
|
0.738 |
18.75 |
2.32 |
58.9 |
8 3/4 |
R |
19 |
|
0.746 |
18.95 |
2.34 |
59.5 |
9 |
R 1/2 |
18 |
|
0.754 |
19.15 |
2.37 |
60.2 |
9 1/4 |
S |
20.25 |
|
0.762 |
19.35 |
2.39 |
60.8 |
9 1/2 |
S 1/2 |
19 |
|
0.77 |
19.56 |
2.42 |
61.4 |
9 3/4 |
T |
21.5 |
|
0.778 |
19.76 |
2.44 |
62.1 |
10 |
T 1/2 |
20 |
|
0.786 |
19.96 |
2.47 |
62.7 |
10 1/4 |
U |
21 |
|
0.794 |
20.17 |
2.49 |
63.4 |
10 1/2 |
U 1/2 |
22 |
22.75 |
0.802 |
20.37 |
2.52 |
64.0 |
10 3/4 |
V |
||
0.81 |
20.57 |
2.54 |
64.6 |
11 |
V 1/2 |
23 |
|
0.818 |
20.78 |
2.57 |
65.3 |
11 1/4 |
W |
25 |
|
0.826 |
20.98 |
2.59 |
65.9 |
11 1/2 |
W 1/2 |
24 |
|
0.834 |
21.18 |
2.62 |
66.6 |
11 3/4 |
X |
||
0.842 |
21.39 |
2.65 |
67.2 |
12 |
X 1/2 |
25 |
27.5 |
0.85 |
21.59 |
2.67 |
67.8 |
12 1/4 |
Y |
||
0.858 |
21.79 |
2.70 |
68.5 |
12 1/2 |
Z |
26 |
28.75 |
0.866 |
22.00 |
2.72 |
69.1 |
12 3/4 |
Z 1/2 |
||
0.874 |
22.20 |
2.75 |
69.7 |
13 |
27 |
||
0.882 |
22.40 |
2.77 |
70.4 |
13 1/4 |
Z1 |
||
0.89 |
22.61 |
2.80 |
71.0 |
13 1/2 |
|||
0.898 |
22.81 |
2.82 |
71.7 |
13 3/4 |
Z2 |
||
0.906 |
23.01 |
2.85 |
72.3 |
14 |
Z3 |
||
0.914 |
23.22 |
2.87 |
72.9 |
14 1/4 |
|||
0.922 |
23.42 |
2.90 |
73.6 |
14 1/2 |
Z4 |
||
0.93 |
23.62 |
2.92 |
74.2 |
14 3/4 |
|||
0.938 |
23.83 |
2.95 |
74.8 |
15 |
|||
0.946 |
24.03 |
2.97 |
75.5 |
15 1/4 |
|||
0.954 |
24.23 |
3.00 |
76.1 |
15 1/2 |
|||
0.962 |
24.43 |
3.02 |
76.8 |
15 3/4 |
|||
0.97 |
24.64 |
3.05 |
77.4 |
16 |
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