ring sizing
Conversion Chart
If possible, it’s best to visit a local jeweller to have your ring size measured.
|
UK Size |
US Size |
Diameter (mm) |
Circumference (mm) |
|---|---|---|---|
B |
1 |
12.37 |
38.9 |
B 1/2 |
1 1/4 |
12.60 |
39.6 |
C |
1 1/2 |
12.78 |
40.2 |
C 1/2 |
1 3/4 |
13.00 |
40.8 |
D |
2 |
13.21 |
41.5 |
D 1/2 |
2 1/4 |
13.41 |
42.1 |
E |
2 1/2 |
13.61 |
42.7 |
E 1/2 |
2 3/4 |
13.83 |
43.4 |
F |
3 |
14.05 |
44.0 |
F 1/2 |
3 1/8 |
14.15 |
44.3 |
|
3 1/4 |
14.25 |
44.6 |
|
G |
3 3/8 |
14.36 |
44.9 |
- |
3 1/2 |
14.45 |
45.2 |
G 1/2 |
3 5/8 |
14.56 |
45.6 |
H |
3 3/4 |
14.65 |
45.9 |
H 1/2 |
4 |
14.86 |
46.5 |
I |
4 1/4 |
15.04 |
47.1 |
I 1/2 |
4 1/2 |
15.27 |
47.8 |
J |
4 5/8 |
15.40 |
48.1 |
- |
4 3/4 |
15.53 |
48.4 |
J 1/2 |
5 |
15.70 |
49.0 |
K |
5 1/8 |
15.80 |
49.3 |
- |
5 1/4 |
15.90 |
49.6 |
K 1/2 |
5 3/8 |
16.0 |
50.0 |
L |
5 1/2 |
16.10 |
50.3 |
- |
5 3/4 |
16.30 |
50.9 |
L 1/2 |
5 7/8 |
16.41 |
51.3 |
M |
6 |
16.51 |
51.5 |
M 1/2 |
6 1/4 |
16.71 |
52.2 |
N |
6 1/2 |
16.92 |
52.8 |
N 1/2 |
6 3/4 |
17.13 |
53.4 |
O |
7 |
17.35 |
54.0 |
O 1/2 |
7 1/4 |
17.45 |
54.7 |
P |
7 1/2 |
17.75 |
55.3 |
P 1/2 |
7 3/4 |
17.97 |
55.9 |
Q |
8 |
18.19 |
56.6 |
Q 1/2 |
8 1/4 |
18.35 |
57.2 |
- |
8 1/2 |
18.53 |
57.8 |
R |
8 5/8 |
18.61 |
58.4 |
- |
8 3/4 |
18.69 |
58.4 |
R 1/2 |
8 7/8 |
18.80 |
59.0 |
- |
9 |
18.89 |
59.1 |
S |
9 1/8 |
19.10 |
59.4 |
- |
9 1/4 |
19.22 |
59.7 |
S 1/2 |
9 3/8 |
19.31 |
60.0 |
- |
9 1/2 |
19.41 |
60.3 |
T |
9 5/8 |
19.51 |
60.6 |
- |
9 3/4 |
19.62 |
60.9 |
T 1/2 |
10 |
19.84 |
61.6 |
U |
10 1/4 |
20.02 |
62.2 |
U 1/2 |
10 1/2 |
20.20 |
62.8 |
V |
10 5/8 |
20.32 |
63.1 |
- |
10 3/4 |
20.44 |
63.5 |
V 1/2 |
11 |
20.68 |
64.1 |
W |
11 1/8 |
20.76 |
64.3 |
- |
11 1/4 |
20.85 |
64.7 |
W 1/2 |
11 3/8 |
20.94 |
65.0 |
- |
11 1/2 |
21.08 |
65.3 |
X |
11 5/8 |
21.18 |
65.7 |
- |
11 3/4 |
21.24 |
66.0 |
X 1/2 |
11 7/8 |
21.30 |
66.3 |
Y |
12 |
21.49 |
66.6 |
Y 1/2 |
12 1/4 |
21.69 |
67.2 |
Z |
12 1/2 |
21.89 |
67.9 |
Z 1/2 |
12 3/4 |
22.10 |
68.5 |
