Size Guide for Rings 2.0
HOW TO FIND YOUR RING SIZE BY MEASURING YOUR FINGER
Ring sizes consist of a single number and can, therefore, be somewhat challenging to decipher. In reality, it's fortunately not that complicated because the number represents the inner circumference of the ring in millimeters and should match the circumference of your finger. So, if your finger has a circumference of 58 mm, you should use a ring of size 58.
You will need: a ruler, scissors, a pencil and a piece of paper.