Correspondence Measurements
| Diameter | Circumference | SIZE |
| 16 mm | 48,38 mm | |
| 16,5 mm | 50,58 mm | |
| 17,2 mm | 53,16 mm | |
| 17,8 mm | 57,76 mm |
How to measure diameter
Step 1 - Make sure the ring you are using is the right size to fit perfectly on the finger you want to wear the new ring on.
Step 2 - Using your ruler or tape measure, measure the widest points inside the ring, from side to side.
How to measure circumference
Step 1 - Wrap the string around the base of your finger so that it fits snugly to its size.
Step 2 - Using a pen or marker, indicate where the ends of the string or paper meet.
Step 3 - Lay out the string or paper strip on a flat surface and measure its length in millimeters. This number is the circumference of your finger!