Ring size chart

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But in any case, best ring size changes make by Your jeweler !

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Conversion chart for ring sizes

 
Inside diameterInside circumferenceSizes
(in)(mm)(in)(mm)United States,
Canada and
Mexico
United Kingdom,
Ireland,
Australia and
New Zealand
China,
Japan,
South America
IndiaItaly,
Spain,
Netherlands,
Switzerland
0.45811.631.4436.50
0.46611.841.4637.2¼
0.47412.041.4937.8½A
0.48212.241.5138.5¾
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
0.78619.962.4762.710¼U212322.75
0.79420.172.4963.410½2223.25
0.80220.372.526410¾V2424
0.8120.572.5464.611232524.75
0.81820.782.5765.311¼W25.25
0.82620.982.5965.911½242626
0.83421.182.6266.611¾X26.5
0.84221.392.6567.212252727.25
0.8521.592.6767.812¼Y2827.75
0.85821.792.768.512½Z2628.5
0.866222.7269.112¾2929
0.87422.22.7569.713273029.75
0.88222.42.7770.413¼Z130.5
0.8922.612.87113½3131
0.89822.812.8271.713¾Z23231.75
0.90623.012.8572.314Z332.25
0.91423.222.8772.914¼3333
0.92223.422.973.614½Z433.5
0.9323.622.9274.214¾3434.25
0.93823.832.9574.8153534.75
0.94624.032.9775.515¼35.5
0.95424.23376.115½3636.25
0.96224.433.0276.815¾36.75
0.9724.643.0577.4163737.5

 

Ring sizes can be measured physically by a plastic or metal ring sizer, or by measuring the girth of a ring that already fits. There are also online measuring tools available. Online measuring tools vary, but many offer multiple ways to measure the ring size, such as wrapping a paper cutout around the finger, or measuring a current ring according to a chart.