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Calculate Your Finger Size

     
Enter here the diameter of your finger
  mm    UK Size

Comparative Sizes
UK H I J K L M N O P Q R S T U V
Europe 7 8 9 10 11 12 14 15 16 17 19 20 21 23 24
USA 4 4.5 5 5.5 6 6.5 7 5.5 8 8.5 9 9.5 10 10.5 11
Diameter(mm) 14.7 15.2 15.6 15.9 16.3 16.6 17.2 17.5 17.8 18.3 18.6 19.1 19.5 19.9 20.3
Circumference (mm) 46.2 48 49 50 51 52 54 55 56 57.5 58.5 60 61.3 62.5 >64

Ways to find the mm diameter of your finger:

Try on your friends rings. Find one that fits so that it just turns on your finger and is tight over the knuckle, then measure the internal diameter in mm with a ruler. You could pop into your nearest jewellers and get your fingers measured and at the same time see what savings you are making with buyrings direct.

Wrap a piece of string around your finger (not too tight), then take measurement and divide by 3.142.

When ordering a diamond set ring it is very important to take care to get your size right.