Welcome to the most trusted place for finding your ring size in different countries. We’ve collected information from reliable sources around the world so you can easily compare your ring size with sizes used in the US, UK/Australia, Europe, India, and Japan.
As more people shop for jewelry online, it’s important to get the size right from the start, especially for valuable items like rings. This guide will help you find your correct size so you can shop with confidence.
|
Diameter (mm) |
Diameter (in) |
Circumference (mm) |
Circumference (in) |
US Size |
UK/AU |
EU |
India |
Japan |
|
14.07 |
0.554 |
44.17 |
1.739 |
3.0 |
F½ |
44.2 |
4 |
4 |
|
14.27 |
0.562 |
44.81 |
1.764 |
3.25 |
G |
44.8 |
4.5 |
5 |
|
14.48 |
0.570 |
45.45 |
1.789 |
3.5 |
G½ |
45.5 |
5 |
6 |
|
14.68 |
0.578 |
46.10 |
1.815 |
3.75 |
H |
46.1 |
5.5 |
7 |
|
14.86 |
0.585 |
46.74 |
1.840 |
4.0 |
H½ |
46.8 |
6 |
7 |
|
15.04 |
0.592 |
47.38 |
1.865 |
4.25 |
I |
47.4 |
6.5 |
8 |
|
15.27 |
0.602 |
48.02 |
1.890 |
4.5 |
I½ |
48.0 |
7 |
9 |
|
15.47 |
0.609 |
48.66 |
1.916 |
4.75 |
J |
48.7 |
8 |
9 |
|
15.70 |
0.618 |
49.30 |
1.941 |
5.0 |
J½ |
49.3 |
9 |
10 |
|
15.90 |
0.626 |
49.95 |
1.966 |
5.25 |
K |
50.0 |
9.5 |
11 |
|
16.10 |
0.634 |
50.59 |
1.992 |
5.5 |
K½ |
50.6 |
10 |
12 |
|
16.30 |
0.642 |
51.23 |
2.017 |
5.75 |
L |
51.2 |
11 |
12 |
|
16.51 |
0.650 |
51.87 |
2.042 |
6.0 |
L½ |
51.9 |
12 |
13 |
|
16.71 |
0.658 |
52.51 |
2.067 |
6.25 |
M |
52.5 |
12.5 |
14 |
|
16.92 |
0.666 |
53.16 |
2.093 |
6.5 |
M½ |
53.1 |
13 |
14 |
|
17.12 |
0.674 |
53.80 |
2.118 |
6.75 |
N |
53.8 |
14 |
15 |
|
17.32 |
0.682 |
54.44 |
2.143 |
7.0 |
N½ |
54.4 |
14.5 |
15 |
|
17.53 |
0.690 |
55.08 |
2.169 |
7.25 |
O |
55.1 |
15 |
16 |
|
17.73 |
0.698 |
55.72 |
2.194 |
7.5 |
O½ |
55.7 |
16 |
17 |
|
17.93 |
0.706 |
56.36 |
2.219 |
7.75 |
P |
56.3 |
16.5 |
17 |
|
18.14 |
0.714 |
57.00 |
2.244 |
8.0 |
P½ |
57.0 |
17 |
18 |
|
18.34 |
0.722 |
57.65 |
2.270 |
8.25 |
Q |
57.6 |
17.5 |
19 |
|
18.54 |
0.730 |
58.29 |
2.295 |
8.5 |
Q½ |
58.3 |
18 |
19 |
|
18.75 |
0.738 |
58.93 |
2.320 |
8.75 |
R |
58.9 |
19 |
20 |
|
18.95 |
0.746 |
59.57 |
2.345 |
9.0 |
R½ |
59.5 |
20 |
21 |
|
19.15 |
0.754 |
60.21 |
2.371 |
9.25 |
S |
60.2 |
20.5 |
22 |
|
19.35 |
0.762 |
60.86 |
2.396 |
9.5 |
S½ |
60.8 |
21 |
23 |
|
19.56 |
0.770 |
61.50 |
2.421 |
9.75 |
T |
61.4 |
22 |
23 |
|
19.76 |
0.778 |
62.14 |
2.446 |
10.0 |
T½ |
62.1 |
22.5 |
24 |
|
19.96 |
0.786 |
62.78 |
2.472 |
10.25 |
U |
62.7 |
23 |
25 |
|
20.17 |
0.794 |
63.42 |
2.497 |
10.5 |
U½ |
63.4 |
24 |
25 |
|
20.37 |
0.802 |
64.06 |
2.522 |
10.75 |
V |
64.0 |
24.5 |
26 |
|
20.57 |
0.810 |
64.71 |
2.547 |
11.0 |
V½ |
64.6 |
25 |
27 |
|
20.78 |
0.818 |
65.35 |
2.573 |
11.25 |
W |
65.3 |
26 |
28 |
|
20.98 |
0.826 |
65.99 |
2.598 |
11.5 |
W½ |
65.9 |
26.5 |
28 |
|
21.18 |
0.834 |
66.63 |
2.623 |
11.75 |
X |
66.5 |
27 |
29 |
|
21.39 |
0.842 |
67.27 |
2.648 |
12.0 |
X½ |
67.2 |
28 |
30 |
|
21.59 |
0.850 |
67.91 |
2.674 |
12.25 |
Y |
67.8 |
28.5 |
31 |
|
21.79 |
0.858 |
68.56 |
2.699 |
12.5 |
Y½ |
68.5 |
29 |
32 |
|
21.99 |
0.866 |
69.20 |
2.724 |
12.75 |
Z |
69.1 |
30 |
32 |
|
22.20 |
0.874 |
69.84 |
2.749 |
13.0 |
Z½ |
69.7 |
31 |
33 |
|
22.40 |
0.882 |
70.48 |
2.775 |
13.25 |
- |
70.4 |
31.5 |
34 |
|
22.60 |
0.890 |
71.12 |
2.800 |
13.5 |
- |
71.0 |
32 |
35 |
|
22.81 |
0.898 |
71.76 |
2.825 |
13.75 |
- |
71.6 |
33 |
35 |
|
23.01 |
0.906 |
72.41 |
2.850 |
14.0 |
- |
72.3 |
34 |
36 |
You can download full ring size conversion chart from here : GemGrownUSA Ring Size Chart