Rings 

Size Inside Diameter Circumference  UK US  EU/FR IT/ES
S 16.5mm / 0.65 in 51.9mm / 2.04 in L 6 51 13
M 17.5mm / 0.69 in 54.4mm / 2.14 in O 7 55 16
L 18.1mm / 0.71 in 57.0mm / 2.24 in Q 8 57 18


Some of our ring designs are adjustable, often featuring a 'squeeze to fit' style, which allows them to fit any size. Please check the individual product details for specific fit notes.