Ring Sizing Chart

Inside diameterInside circumferenceSizes
(in)(mm)(in)(mm)USUKJapanIndiaItaly
0.45811.631.4436.50
0.46611.841.4637.2
0.47412.041.4937.8A
0.48212.241.5138.5
0.4912.451.5439.11B1
0.49812.651.5639.7
0.50612.851.5940.4C0.5
0.51413.061.614111
0.52213.261.6441.72D221.75
0.5313.461.6742.32.25
0.53813.671.6942.9E333
0.54613.871.7243.643.5
0.55414.071.7444.23F44.25
0.56214.271.7744.8554.75
0.5714.481.7945.5G5.5
0.57814.681.8246.1666
0.58614.881.8446.84H76.75
0.59415.091.8747.477.5
0.60215.291.8948I888
0.6115.491.9248.7J98.75
0.61815.71.9449.3599.25
0.62615.91.9750K1010
0.63416.11.9950.61010.5
0.64216.312.0251.2L1111.25
0.6516.512.0451.96111211.75
0.65816.712.0752.5M1212.5
0.66616.922.0953.1131313.25
0.67417.122.1253.8N13.75
0.68217.322.1454.47141414.5
0.6917.532.1755.1O1515
0.69817.732.1955.71515.75
0.70617.932.2256.3P1616.25
0.71418.142.24578161717
0.72218.342.2757.6Q17.5
0.7318.542.2958.3171818.25
0.73818.752.3258.9R1919
0.74618.952.3459.591819.5
0.75419.152.3760.2S2020.25
0.76219.352.3960.8192120.75
0.7719.562.4261.4T21.5
0.77819.762.4462.110202222
0.78619.962.4762.7U212322.75
0.79420.172.4963.42223.25
0.80220.372.5264V2424
0.8120.572.5464.611232524.75
0.81820.782.5765.3W25.25
0.82620.982.5965.9242626
0.83421.182.6266.6X26.5
0.84221.392.6567.212252727.25
0.8521.592.6767.8Y2827.75
0.85821.792.768.5Z2628.5
0.866222.7269.12929
0.87422.22.7569.713273029.75
0.88222.42.7770.4Z130.5
0.8922.612.8713131
0.89822.812.8271.7Z23231.75
0.90623.012.8572.314Z332.25
0.91423.222.8772.93333
0.92223.422.973.6Z433.5
0.9323.622.9274.23434.25
0.93823.832.9574.8153534.75
0.94624.032.9775.535.5
0.95424.23376.13636.25
0.96224.433.0276.836.75
0.9724.643.0577.4163737.5