Size:
18mm: Inner diameter 18mm, Circumference 56.54mm
19mm: Inner diameter 19mm, Circumference 59.66mm
20mm: Inner diameter 0.8 inches (20 mm), Circumference 2.5 inches (62.8 mm).
21mm: Inner diameter 0.8 inch (21 mm), Circumference 2.6 inch (65.94 mm).
22mm: Inner diameter 0.9 inches (22 mm), Circumference 2.7 inches (69.08 mm).
23mm: Inner diameter 0.9 inches (23 mm), Circumference 2.8 inches (72.22 mm).
How to find the right ring?
Buyer take one cotton thread and measure the circumference of the ring around the base of the finger where the ring was put on.
The circumference measured is around the product.