International Ring Size Conversion Chart
Our rings can also be made to order to international sizes. Choose your nearest UK size in the drop-down menu on the product listing page and specify your international ring size in the comments box at check out. Use this chart to convert your local standard sizes to your UK ring sizes for ordering. If you are unsure of your size before ordering then please consider trying our online wedding ring sizer service first.
|
U.S. Size
|
Diameter
in Inches |
Diameter
in MM |
Metric MM
Equivalent |
British
|
French
|
German
|
Japanese
|
Swiss
|
|
0000
|
.390
|
9.91
|
-
|
-
|
-
|
-
|
-
|
-
|
|
00
|
.422
|
10.72
|
-
|
-
|
-
|
-
|
-
|
-
|
|
0
|
.454
|
11.53
|
-
|
-
|
-
|
-
|
-
|
-
|
|
1/2
|
.474
|
11.95
|
-
|
A
|
-
|
-
|
-
|
-
|
|
3/4
|
.482
|
12.18
|
-
|
A 1/2
|
-
|
-
|
-
|
-
|
|
1
|
.487
|
12.37
|
38.9
|
B
|
-
|
-
|
1
|
-
|
|
1 1/4
|
-
|
12.60
|
39.6
|
B 1/2
|
-
|
-
|
-
|
-
|
|
1 1/2
|
.503
|
12.78
|
40.2
|
C
|
-
|
-
|
-
|
-
|
|
1 3/4
|
-
|
13.00
|
40.8
|
C 1/2
|
-
|
-
|
-
|
-
|
|
2
|
.520
|
13.21
|
41.5
|
D
|
41 1/2
|
13 1/2
|
2
|
1 1/2
|
|
2 1/4
|
-
|
13.41
|
42.1
|
D 1/2
|
-
|
-
|
-
|
-
|
|
2 1/2
|
.536
|
13.61
|
42.7
|
E
|
42 3/4
|
13 3/4
|
3
|
2 3/4
|
|
2 3/4
|
-
|
13.83
|
43.4
|
E 1/2
|
-
|
-
|
-
|
-
|
|
3
|
.553
|
14.05
|
44.0
|
F
|
44
|
14
|
4
|
4
|
|
3 1/8
|
-
|
14.15
|
44.3
|
F 1/2
|
-
|
-
|
-
|
-
|
|
3 1/4
|
-
|
14.25
|
44.6
|
-
|
-
|
-
|
-
|
-
|
|
3 3/8
|
-
|
14.36
|
44.9
|
G
|
45 1/4
|
-
|
5
|
5 1/4
|
|
3 1/2
|
.569
|
14.45
|
45.2
|
-
|
-
|
14 1/2
|
-
|
-
|
|
3 5/8
|
-
|
14.56
|
45.6
|
G 1/2
|
-
|
-
|
6
|
-
|
|
3 3/4
|
-
|
14.65
|
45.9
|
H
|
46 1/2
|
-
|
-
|
6 1/2
|
|
4
|
.585
|
14.86
|
46.5
|
H 1/2
|
-
|
15
|
7
|
-
|
|
4 1/4
|
-
|
15.04
|
47.1
|
I
|
47 3/4
|
-
|
-
|
7 3/4
|
|
4 1/2
|
.601
|
15.27
|
47.8
|
I 1/2
|
-
|
15 1/4
|
8
|
-
|
|
4 5/8
|
-
|
15.40
|
48.1
|
J
|
49
|
15 1/2
|
-
|
9
|
|
4 3/4
|
-
|
15.53
|
48.4
|
-
|
-
|
-
|
-
|
-
|
|
5
|
.618
|
15.70
|
49.0
|
J 1/2
|
-
|
15 3/4
|
9
|
-
|
|
5 1/8
|
-
|
15.80
|
49.3
|
K
|
50
|
-
|
-
|
10
|
|
5 1/4
|
-
|
15.90
|
49.6
|
-
|
-
|
-
|
-
|
-
|
|
5 3/8
|
-
|
16.0
|
50.0
|
K 1/2
|
-
|
-
|
10
|
-
|
|
5 1/2
|
.634
|
16.10
|
50.3
|
L
|
51 3/4
|
16
|
-
|
11 3/4
|
|
5 3/4
|
-
|
16.30
|
50.9
|
-
|
-
|
-
|
-
|
-
|
|
5 7/8
|
-
|
16.41
|
51.3
|
L 1/2
|
-
|
-
|
-
|
-
|
|
6
|
.650
|
16.51
|
51.5
|
M
|
52 3/4
|
16 1/2
|
12
|
12 3/4
|
|
6 1/4
|
-
|
16.71
|
52.2
|
M 1/2
|
-
|
-
|
-
|
-
|
|
6 1/2
|
.666
|
16.92
|
52.8
|
N
|
54
|
17
|
13
|
14
|
|
6 3/4
|
-
|
17.13
|
53.4
|
N 1/2
|
-
|
-
|
-
|
-
|
|
7
|
.683
|
17.35
|
54.0
|
O
|
55 1/4
|
17 1/4
|
14
|
15 1/4
|
|
7 1/4
|
-
|
17.45
|
54.7
|
O 1/2
|
-
|
-
|
-
|
-
|
|
7 1/2
|
.699
|
17.75
|
55.3
|
P
|
56 1/2
|
17 3/4
|
15
|
16 1/2
|
|
7 3/4
|
-
|
17.97
|
55.9
|
P 1/2
|
-
|
-
|
-
|
-
|
|
8
|
.716
|
18.19
|
56.6
|
Q
|
57 3/4
|
18
|
16
|
17 3/4
|
|
8 1/4
|
-
|
18.35
|
57.2
|
Q 1/2
|
-
|
-
|
-
|
-
|
|
8 1/2
|
.732
|
18.53
|
57.8
|
-
|
-
|
18 1/2
|
17
|
-
|
|
8 5/8
|
-
|
18.61
|
58.4
|
R
|
59
|
-
|
-
|
19
|
|
8 3/4
|
-
|
18.69
|
58.4
|
-
|
-
|
-
|
-
|
-
|
|
8 7/8
|
-
|
18.80
|
59.0
|
R 1/2
|
-
|
-
|
-
|
-
|
|
9
|
.748
|
18.89
|
59.1
|
-
|
-
|
19
|
18
|
-
|
|
9 1/8
|
-
|
19.10
|
59.4
|
S
|
60 1/4
|
-
|
-
|
20 1/4
|
|
9 1/4
|
-
|
19.22
|
59.7
|
-
|
-
|
-
|
-
|
-
|
|
9 3/8
|
-
|
19.31
|
60.0
|
S 1/2
|
-
|
-
|
-
|
-
|
|
9 1/2
|
.764
|
19.41
|
60.3
|
-
|
-
|
19 1/2
|
19
|
-
|
|
9 5/8
|
-
|
19.51
|
60.6
|
T
|
61 1/2
|
-
|
-
|
21 1/2
|
|
9 3/4
|
-
|
19.62
|
60.9
|
-
|
-
|
-
|
-
|
-
|
|
10
|
.781
|
19.84
|
61.6
|
T 1/2
|
-
|
20
|
20
|
-
|
|
10 1/4
|
-
|
20.02
|
62.2
|
U
|
62 3/4
|
-
|
21
|
22 3/4
|
|
10 1/2
|
.797
|
20.20
|
62.8
|
U 1/2
|
-
|
20 1/4
|
22
|
-
|
|
10 5/8
|
-
|
20.32
|
63.1
|
V
|
63
|
-
|
-
|
23 3/4
|
|
10 3/4
|
-
|
20.44
|
63.5
|
-
|
-
|
-
|
-
|
-
|
|
11
|
.814
|
20.68
|
64.1
|
V 1/2
|
-
|
20 3/4
|
23
|
-
|
|
11 1/8
|
-
|
20.76
|
64.3
|
W
|
65
|
-
|
-
|
25
|
|
11 1/4
|
-
|
20.85
|
64.7
|
-
|
-
|
-
|
-
|
-
|
|
11 3/8
|
-
|
20.94
|
65.0
|
W 1/2
|
-
|
-
|
-
|
-
|
|
11 1/2
|
-
|
21.08
|
65.3
|
-
|
-
|
21
|
24
|
-
|
|
11 5/8
|
.830
|
21.18
|
65.7
|
X
|
66 1/4
|
-
|
-
|
26 1/4
|
|
11 3/4
|
-
|
21.24
|
66.0
|
-
|
-
|
-
|
-
|
-
|
|
11 7/8
|
-
|
21.30
|
66.3
|
X 1/2
|
-
|
-
|
-
|
-
|
|
12
|
.846
|
21.49
|
66.6
|
Y
|
67 1/2
|
21 1/4
|
25
|
27 1/2
|
|
12 1/4
|
-
|
21.69
|
67.2
|
Y 1/2
|
-
|
-
|
-
|
-
|
|
12 1/2
|
.862
|
21.89
|
67.9
|
Z
|
68 3/4
|
21 3/4
|
26
|
28 3/4
|
|
12 3/4
|
-
|
22.10
|
68.5
|
Z 1/2
|
-
|
-
|
-
|
-
|
|
13
|
.879
|
22.33
|
69.1
|
-
|
-
|
22
|
27
|
-
|
