DonJoy Rotulax Elastic Knee Brace The DonJoy RotuLax elastic knitted support with kneecap pad incorporates flexible bilateral stays and a contoured knee pad in a breathable elastic construction. Provides Support for Patients with Hyperlax Patella Post-Operative Support after Patellar Operations Comes with built-in, flexible bilateral stays Available with open patella Silicone patellar buttress Fits left or right knee Latex free Take the measurement of your thigh 15cm above your kneecap using a flexible type tape measure. Use the diameter you measure here to choose your size. Size Circumference X-Small 13.5″ – 15″ (35-38 cm) Small 15.5″ – 16.5″ (39-42 cm) Medium 17″- 18″ (43-46 cm) Large 18.5″- 19.5″ (47-49 cm) X-Large 19.5″- 21″ (50-53 cm) XX-Large 21″- 22.5″ (54-57 cm)
