G-Form PRO-X Knee Pads [Large] Black/Yellow Size: 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. L Size is for: THIGH (measure 6" above kneecap) 17.5-18.5in / 44.5-47cm -- CALF (measure around largest point) 15-16in / 38-40.5cm