Ring Size (Indian) Circumference Diameter
Inches MM Inches MM
1 1.61 41 0.51 13.1
2 1.64 41.7 0.52 13.3
3 1.68 42.9 0.54 13.7
4 1.73 44.1 0.55 13.9
5 1.76 44.8 0.56 14.3
6 1.81 46.1 0.57 14.7
7 1.86 47.4 0.59 15.1
8 1.88 48 0.6 15.3
9 1.91 48.7 0.61 15.5
10 1.96 50 0.62 15.9
11 2.01 51.2 0.64 16.3
12 2.04 51.9 0.65 16.5
13 2.09 53.1 0.66 16.9
14 2.14 54.4 0.68 17.3
15 2.16 55.1 0.69 17.5
16 2.21 56.3 0.7 17.9
17 2.24 57 0.71 18.1
18 2.29 58.3 0.72 18.5
19 2.31 58.9 0.73 18.7
20 2.37 60.2 0.75 19.1
21 2.39 60.8 0.76 19.3
22 2.44 62.1 0.77 19.7
23 2.46 62.7 0.78 19.9
24 2.51 64 0.8 20.4
25 2.54 64.6 0.81 20.6
26 2.59 65.9 0.82 21
27 2.64 67.2 0.84 21.4
28 2.66 67.8 0.85 21.6
29 2.72 69.1 0.86 22
30 2.74 69.7 0.87 22.2