International Ring Size Conversion Chart
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1International Ring Size Conversion Chart
US & Canada
Inside Diameter Sizes
MM
MM
5
15.70
49.32
5 1/2
16.10
50.58
6
16.51
51.87
6 1/2
16.92
53.16
7
17.35
54.51
7 1/2
17.75
55.76
8
18.19
57.15
8 1/2
18.53
58.21
9
18.89
59.34
9 1/2
19.41
60.98
10
19.84
62.33
10 1/2
20.20
63.46
11
20.68
64.97
11 1/2
21.08
66.22
12
21.49
67.51
12 1/2
21.89
68.77
13
22.33
70.15
13.5
22.60
71.00
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Parent category: Life