G-Form Pro-X Knee Pad XL-Black/Black w/Yellow Size: X-Large Color: Black/Black w/Yellow RPT Impact Protection: Articulated Design, Flexible, Lightweight, Low-Profile - Machine Washable - Stays In Place - Comfortable G-Form PRO-X Knee Pads fully articulated design offers maximum protection centering on and surrounding your joint, with virtually no bulk. With G-Form, you never have to worry about compromising movement, in fact you will not even realize you are wearing them. XL Size is for: THIGH (measure 6" above kneecap) 18.5-20in / 47-51cm -- CALF (measure around largest point) 16-18in / 40.5-45.5cm