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International Ring Size Conversion Chart

Inner Diameter (mm)Circumference (mm)U.S & CanadaU.K, Ireland, Australia, and New ZealandChina, Japan, India, and South AfricaItaly, Netherlands, Spain, and SwitzerlandSouth Korea
13.0040.841.75C1/211
13.3341.52D21.752
13.6742.762.5E333
14.0044.23F44.254
14.3344.773.25F1/254.755
14.6746.023.75G1/2666
15.0047.254.25H1/27.57
15.33484.5I888
15.6749.35J1/299.259
16.0050.585.5K1/21010.2510
16.3351.215.75L11.2511
16.6752.56.25M1212.512
17.0053.16.5M1/21313.2513
17.3354.57N1/21414.514
17.6755.767.5O1/21515.7515
18.0056.457.75P16.2516
18.3357.658.25Q17.517
18.6758.728.75R1918
19.0059.59R1/21819.519
19.3360.989.5S1/21920.7520
19.6762.3310T1/2202221
Tips to consider when measuring a ring size:
  • If your knuckle is thicker than the wearing part, it is recommended that you wear one size larger.
  • If your hands tend to swell at morning and night, you should consider wearing one size larger.
  • It is necessary to reduce the error through multiple measurements rather than a single measurement to obtain a more accurate size.

*If you’re still unsure about your ring size, please don’t hesitate to contact us for assistance!

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