Corresponding size:
S size: suitable for thigh circumference between 10.2-14.5 inches (26-37 cm)
M size: suitable for thigh circumference between 13.8-18.5 inches (35-47 cm)
L size: suitable for thigh circumference 15.3-20.5 inch(39-52 cm)
XL size: Suitable for thigh circumference 19.3-23.2 inches (49-59 cm)
XXL size: suitable for thigh circumference 22.4-26.7 inches (57-68 cm)
Start measuring 4 inches (10 cm) above the knee
1. Ordinary model (this link): OK fabric + EVA shock absorption + bracket
2. Upgraded model (increased size): OK fabric + silicone shock absorption + bracket