Ring Sizes can vary by brand. We express most of the dimensions in millimetres of the circumference or the inner diameter of the ring (also known as the European ring size). Occasionally the US sizing is being used. But what is the best way to calculate your size?

Ways to determine the size

A convenient way to do it yourself is the following: you can take a string or ribbon around your finger and measure the millimetres with a ruler. Just make sure you do not overtighten the ribbon or string, but keep it a little loose. If your number of millimetres doesn’t match precisely the amount of millimetres indicated in the table, then take the closest (larger) size. The best moment to do this is at the end of the day in a warm environment. The reason for this is that your fingers but also your legs will be slightly more swollen. Even when it is colder, your hands or fingers “shrink”. So that would mean that maybe you wouldn’t be able to wear your ring in summer.

To determine the inner diameter, you can look up the size in millimetres in the size chart and find the associated inner diameter.

ring size determine

You can also find US sizes in the ring size table by linking the periphery to the designated US size.

Many jewellers or shops where they sell rings can also measure your ring size. The jewellers use special tools to measure ring sizes. You might know them, but there is no use to buy something only especially for that.

So this is how to determine your ring size. Simple, isn’t it?

Fancy one-of-a-kind rings now? You can shop our unique rings here at Yazzy’s.

Conversions of Ring Sizes

Inside diameter Inside circumference
InchesMMInchesMMUSUKChina/Japan IndiaEU
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   
0.50612.851.5940.4C  0.5
0.51413.061.6141 11
0.52213.261.6441.72D221.75
0.5313.461.6742.3  2.25
0.53813.671.6942.9E333
0.54613.871.7243.6 43.5
0.55414.071.7444.23F4 4.25
0.56214.271.7744.8554.75
0.5714.481.7945.5G  5.5
0.57814.681.8246.1666
0.58614.881.8446.84H7 6.75
0.59415.091.8747.4 77.5
0.60215.291.8948I888
0.6115.491.9248.7J 98.75
0.61815.71.9449.359 9.25
0.62615.91.9750K 1010
0.63416.11.9950.610 10.5
0.64216.312.0251.2L 1111.25
0.6516.512.0451.96111211.75
0.65816.712.0752.5M12 12.5
0.66616.922.0953.1131313.25
0.67417.122.1253.8N  13.75
0.68217.322.1454.47141414.5
0.6917.532.1755.1O 1515
0.69817.732.1955.715 15.75
0.70617.932.2256.3P 1616.25
0.71418.142.24578161717
0.72218.342.2757.6Q  17.5
0.7318.542.2958.3171818.25
0.73818.752.3258.9R 1919
0.74618.952.3459.5918 19.5
0.75419.152.3760.2S 2020.25
0.76219.352.3960.8192120.75
0.7719.562.4261.4T  21.5
0.77819.762.4462.110202222
0.78619.962.4762.710¼U212322.75
0.79420.172.4963.410½22 23.25
0.80220.372.526410¾V 2424
0.8120.572.5464.611232524.75
0.81820.782.5765.311¼W  25.25
0.82620.982.5965.911½242626
0.83421.182.6266.611¾X  26.5
0.84221.392.6567.212252727.25
0.8521.592.6767.812¼Y 2827.75
0.85821.792.768.512½Z26 28.5
0.866222.7269.112¾ 2929
0.87422.22.7569.713 273029.75
0.88222.42.7770.413¼Z1  30.5
0.8922.612.87113½  3131
0.89822.812.8271.713¾Z2 3231.75
0.90623.012.8572.314Z3  32.25
0.91423.222.8772.914¼  3333
0.92223.422.973.614½Z4  33.5
0.9323.622.9274.214¾  3434.25
0.93823.832.9574.815  3534.75
0.94624.032.9775.515¼   35.5
0.95424.23376.115½  3636.25
0.96224.433.0276.815¾   36.75
0.9724.643.0577.416  3737.5

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