RIng Sizes Different Ring Sizes

Vimanas rings come in 3 sizes:
Small | Medium | Large

49.95mm   circumference
15.90mm diameter
UK Size:  K
US Size:  5 1/4

52.46mm   circumference
16.7mm diameter
UK Size:  M
US Size:  6 1/4

56.32mm   circumference
17.93mm diameter
UK Size:  P
US Size:  7 3/4

In order to learn your ring size, go to your local jewellery store and ask them to measure it for you. The other option is to gently wrap some string around your finger and measure the string with a ruler (you can give or take 1mm).