Size Guide
| Size | Circumference (mm/inch) | Inner Diameter (mm/inch) |
|---|---|---|
| S | 54 mm / 2.125 in | 17 mm / 0.669 in |
| M | 56 mm / 2.204 in | 18 mm / 0.708 in |
| L | 60 mm / 2.362 in | 19 mm / 0.748 in |
| XL | 62 mm / 2.440 in | 20 mm / 0.787 in |
Round up if you are in between two sizes.