Corset ring silver colored (various sizes)

Size 5 = 16 mm diameter.

Size 6 = 17 mm diameter

Size 7 = 17.5 mm diameter

Size 8 = 18 mm diameter

Size 9 = 19 mm diameter

Size 10 = 19.5 mm diameter

Size 11 = 20 mm diameter

If you want to know the inner circumference instead of the diameter, multiply the diameter by 3.14