| Size |
Size | Circumference Inches | Circumference Centimeters |
| XS | 6-6 3/8" | 21.2-21.6" | 53-54 cm |
| S | 6 3/8-6 7/8" | 21.7-22" | 55-56 cm |
| M | 7-7 1/8" | 22.4-22.8" | 57-58 cm |
| L | 7 1/4-7 3/8" | 23.2-23.6" | 59-60 cm |
| XL | 7 1/2-7 5/8" | 24-24.4" | 61-62 cm |
| XXL | 7 3/4-8" | 24.8-25.2" | 63-64 cm |