Size	Knee Width (cm)	Knee Width (Inch)
Small	10.2 - 10.8 cm	4 - 4.25 inches
Medium	10.8 - 11.4 cm	4.25 - 4.5 inches
Large	11.4 - 12 cm	4.5 - 4.75 inches
X Large	12 - 13.1 cm	4.75 - 5 inches
XX Large	13.1 - 14.1 cm	5 - 6.25 inches