RING SIZE OVERVIEW

DETERMINE YOUR RING SIZE BASED ON AN EXISTING RING
Choose a ring that you know is the right size.
Measure the inside diameter of the ring at the widest point of the hole.
Check the table to see how many mm the European ring size corresponds to. If you are between two sizes, choose the larger one.

DETERMINE YOUR RING SIZE FOR YOUR FINGER
Wrap a tape around the finger you want to measure, making sure it is not too tight.
Then measure the length of the thread in mm. The length of the thread corresponds to your size. If you are between two sizes, choose the larger one.
Round the length up according to the table below.