International Ring Size Conversion Chart

International Ring Size Conversion Chart

When it comes to determining the size of your ring, we highly recommend that you get your ring size measured by reputable jewelers until at least two agree on the same ring size. Be sure to check out the video on our How to: Get Your Custom Ring Sized Properly blog post. See our ring size conversion chart below to determine your ring size within your region.

New Column New Column New Column New Column New Column New Column New Column New Column
US Size
Dia. (mm)
Circ.(mm)
British
French
German
Japanese
Swiss
0.500
11.94
37.52
A
0.625
12.05
37.85
0.750
12.15
38.18
A 1/2
0.875
12.26
38.50
1.000
12.36
38.83
B
1
1.125
12.46
39.15
1.250
12.57
39.48
B 1/2
1.375
12.67
39.80
1.500
12.77
40.13
C
0.5
1.625
12.88
40.45
1.750
12.98
40.78
C 1/2
1
1.875
13.08
41.10
2.000
13.19
41.43
D
41.50
13.50
2
1.75
2.125
13.29
41.76
2.250
13.39
42.08
D 1/2
2.25
2.375
13.50
42.41
2.500
13.60
42.73
E
42.75
13.75
3
3.00
2.625
13.71
43.06
2.750
13.81
43.38
E 1/2
3.5
2.875
13.91
43.71
3.000
14.02
44.03
F
44
14
4
4.25
3.125
14.12
44.36
3.250
14.22
44.68
F 1/2
5
4.75
3.375
14.33
45.01
45.25
3.500
14.43
45.34
G
14.50
5.5
3.625
14.53
45.66
3.750
14.64
45.99
G 1/2
46.50
6
6.00
3.875
14.74
46.31
4.000
14.85
46.64
H
15
7
6.75
4.125
14.95
46.96
4.250
15.05
47.29
H 1/2
47.75
7.50
4.375
15.16
47.61
4.500
15.26
47.94
I
15.25
8
8
4.625
15.36
48.26
49
15.50
4.750
15.47
48.59
J
8.75
4.875
15.57
48.92
5.000
15.67
49.24
J 1/2
15.75
9
9.25
5.125
15.78
49.57
50
5.250
15.88
49.89
K
10
5.375
15.98
50.22
5.500
16.09
50.54
K 1/2
51.75
16
10
5.625
16.19
50.87
5.750
16.30
51.19
L
11.25
5.875
16.40
51.52
6.000
16.50
51.85
L 1/2
52.75
16.50
11
11.75
6.125
16.61
52.17
6.250
16.71
52.50
M
12
12.5
6.375
16.81
52.82
6.500
16.92
53.15
M 1/2
54
17
13
13.25
6.625
17.02
53.47
6.750
17.12
53.80
N
13.75
6.875
17.23
54.12
7.000
17.33
54.45
N 1/2
55.25
17.25
14
14.50
7.125
17.44
54.77
7.250
17.54
55.10
O
15
7.375
17.64
55.43
7.500
17.75
55.75
O 1/2
56.50
17.75
15
15.75
7.625
17.85
56.08
7.750
17.95
56.40
P
16.25
7.875
18.06
56.73
8.000
18.16
57.05
P 1/2
57.75
18
16
17.00
8.125
18.26
57.38
8.250
18.37
57.70
Q
17.5
8.375
18.47
58.03
8.500
18.57
58.35
Q 1/2
58
18.50
17
18.25
8.625
18.68
58.68
59
8.750
18.78
59.01
R
19
8.875
18.89
59.33
9.000
18.99
59.66
R 1/2
19
18
19.5
9.125
19.09
59.98
60.25
9.250
19.20
60.31
S
20.25
9.375
19.30
60.63
9.500
19.40
60.96
S 1/2
19.50
19
20.75
9.625
19.51
61.28
61.50
9.750
19.61
61.61
T
21.50
9.875
19.71
61.93
10.000
19.82
62.26
T 1/2
20
20
22
10.125
19.92
62.59
10.250
20.03
62.91
U
62.75
21
22.75
10.375
20.13
63.24
10.500
20.23
63.56
U 1/2
20.25
22
23.25
10.625
20.34
63.89
63
10.750
20.44
64.21
V
24
10.875
20.54
64.54
11.000
20.65
64.86
V 1/2
20.75
23
24.75
11.125
20.75
65.19
65
11.250
20.85
65.51
W
25.25
11.375
20.96
65.84
11.500
21.06
66.17
W 1/2
21
24
26
11.625
21.16
66.49
66.25
11.750
21.27
66.82
X
26.5
11.875
21.37
67.14
12.000
21.48
67.47
X 1/2
67.50
21.25
25
27.25
12.125
21.58
67.79
12.250
21.68
68.12
Y
27.75
12.375
21.79
68.44
12.500
21.89
68.77
Z
68.75
21.75
26
28.50
12.625
21.99
69.09
12.750
22.10
69.42
Z 1/2
29
12.875
22.20
69.75
13.000
22.30
70.07
22
27
29.75
13.125
22.41
70.40
13.250
22.51
70.72
Z1
30.5
13.375
22.62
71.05
13.500
22.72
71.37
31
13.625
22.82
71.70
13.750
22.93
72.02
Z2
31.75
13.875
23.03
72.35
14.000
23.13
72.68
Z3
32.25
14.125
23.24
73.00
14.250
23.34
73.33
33
14.375
23.44
73.65
14.500
23.55
73.98
Z4
33.5
14.625
23.65
74.30
14.750
23.75
74.63
34.25
14.875
23.86
74.95
15.000
23.96
75.28
34.75
15.125
24.07
75.60
15.250
24.17
75.93
35.5
15.375
24.27
76.26
15.500
24.38
76.58
36.25
15.625
24.48
76.91
15.750
24.58
77.23
36.75
15.875
24.69
77.56
16.000
24.79
77.88
37.5
16.125
24.89
78.21
16.250
25.00
78.53
16.375
25.10
78.86
16.500
25.21
79.18
16.625
25.31
79.51
16.750
25.41
79.84
16.875
25.52
80.16
17.000
25.62
80.49
17.125
25.72
80.81
17.250
25.83
81.14
17.375
25.93
81.46
17.500
26.03
81.79
17.625
26.14
82.11
17.750
26.24
82.44
17.875
26.34
82.76
18.000
26.45
83.09
18.125
26.55
83.42
18.250
26.66
83.74
18.375
26.76
84.07
18.500
26.86
84.39
18.625
26.97
84.72
18.750
27.07
85.04
18.875
27.17
85.37
19.000
27.28
85.69
19.125
27.38
86.02
19.250
27.48
86.34
19.375
27.59
86.67
19.500
27.69
87.00
19.625
27.80
87.32
19.750
27.90
87.65
19.875
28.00
87.97
20.000
28.11
88.30

Note: Rings are not re-sizable. All rings have a custom COMFORT FIT, unless otherwise noted in the product description. 

Tagged: Sizing
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