Ring Size (Indian)InchesMM 1 1.61 41.01 2 1.64 42.70 3 1.69 42.90 4 1.72 43.60 5 1.76 44.80 6 1.81 46.10 7 1.87 47.40 8 1.89 48.00 9 1.92 48.70 10 1.97 50.00 11 2.02 51.20 12 2.04 51.90 13 2.09 53.10 14 2.14 54.40 15 2.02 55.10 Ring Size (Indian)InchesMM 16 2.22 56.30 17 2.24 57.00 18 2.30 58.30 19 2.32 58.90 20 2.37 60.20 21 2.39 60.80 22 2.44 62.10 23 2.47 62.70 24 2.52 64.00 25 2.54 64.60 26 2.59 65.90 27 2.65 67.20 28 2.67 67.80 29 2.72 69.10 30 2.80 71.00