Ring Sizing Chart

Ring Sizes
Measured Size
USA & Canada
Inside Diameter
Inside Circumference
Inches
MM
Inches
MM
0
0.458
11.63
1.44
36.5
1/4
0.466
11.84
1.46
37.2
1/2
0.474
12.04
1.49
37.8
3/4
0.482
12.24
1.51
38.5
1
0.49
12.45
1.54
39.1
1 1/4
0.498
12.65
1.56
39.7
1 1/2
0.506
12.85
1.59
40.4
1 3/4
0.514
13.06
1.61
41.0
2
0.522
13.26
1.64
41.7
2 1/4
0.53
13.46
1.67
42.3
2 1/2
0.538
13.67
1.69
42.9
2 3/4
0.546
13.87
1.72
43.6
3
0.554
14.07
1.74
44.2
3 1/4
0.562
14.27
1.77
44.8
3 1/2
0.57
14.48
1.79
45.5
3 3/4
0.578
14.68
1.82
46.1
4
0.586
14.88
1.84
46.8
4 1/4
0.594
15.09
1.87
47.4
4 1/2
0.602
15.29
1.89
48.0
4 3/4
0.61
15.49
1.92
48.7
5
0.618
15.70
1.94
49.3
5 1/4
0.626
15.90
1.97
50.0
5 1/2
0.634
16.10
1.99
50.6
5 3/4
0.642
16.31
2.02
51.2
6
0.65
16.51
2.04
51.9
6 1/4
0.658
16.71
2.07
52.5
6 1/2
0.666
16.92
2.09
53.1
6 3/4
0.674
17.12
2.12
53.8
7
0.682
17.32
2.14
54.4
7 1/4
0.69
17.53
2.17
55.1
7 1/2
0.698
17.73
2.19
55.7
7 3/4
0.706
17.93
2.22
56.3
8
0.714
18.14
2.24
57.0
8 1/4
0.722
18.34
2.27
57.6
8 1/2
0.73
18.54
2.29
58.3
8 3/4
0.738
18.75
2.32
58.9
9
0.746
18.95
2.34
59.5
9 1/4
0.754
19.15
2.37
60.2
9 1/2
0.762
19.35
2.39
60.8
9 3/4
0.77
19.56
2.42
61.4
10
0.778
19.76
2.44
62.1
10 1/4
0.786
19.96
2.47
62.7
10 1/2
0.794
20.17
2.49
63.4
10 3/4
0.802
20.37
2.52
64.0
11
0.81
20.57
2.54
64.6
11 1/4
0.818
20.78
2.57
65.3
11 1/2
0.826
20.98
2.59
65.9
11 3/4
0.834
21.18
2.62
66.6
12
0.842
21.39
2.65
67.2
12 1/4
0.85
21.59
2.67
67.8
12 1/2
0.858
21.79
2.70
68.5
12 3/4
0.866
22.00
2.72
69.1
13
0.874
22.20
2.75
69.7
13 1/4
0.882
22.40
2.77
70.4
13 1/2
0.89
22.61
2.80
71.0
13 3/4
0.898
22.81
2.82
71.7
14
0.906
23.01
2.85
72.3
14 1/4
0.914
23.22
2.87
72.9
14 1/2
0.922
23.42
2.90
73.6
14 3/4
0.93
23.62
2.92
74.2
15
0.938
23.83
2.95
74.8
15 1/4
0.946
24.03
2.97
75.5
15 1/2
0.954
24.23
3.00
76.1
15 3/4
0.962
24.43
3.02
76.8
16
0.97
24.64
3.05
77.4