Tip: take a string to measure the circumference of your finger or measure the diameter (of the inside!) of another ring.

With wide rings, it is recommended to order a size larger if in doubt.

inside circumference (in mm) inside diameter (in mm)
Size 6 52.5 16.6
Size 7 55 17.3
Size 8 57.2 18.2
Size 9 60.5 19.2