The easiest and most accurate Method to find your ring size is using the official Purman ring sizer.
➤ METHOD A
You already have a ring that fits perfectly?
Measure the inside DIAMETER of the ring with a ruler and multiply the diameter with 3,14 (pi). Thats your CIRCUMFERENCE (EU ring size).
➤ METHOD BYou can easily measure your ring size with this method at home:
1. Wrap a strip of paper lengthways around your finger. Make sure the strip isn't too loose.
2. Mark the end of the overlap with a straight line.
3. Measure the marked route. The result corresponds to your EU ring size (CIRCUMFERENCE).