Small 12 - 13 When Sizing Measure Slightly Bent Underneath Knee Cap Useful In The Treatment Of Patella Dislocation Chrondomalacia Patella And Osgood Schlatters Disease Allows More Flexiblity Around The Kneecap As The Kneecap Is Free From Compression Any Tenderness Or Bruising Present On The Kneecap Itself Will Not Be Aggravated Captures Body Heat & Increases Blood Flow Allows Skin To Ventilate & Release Moisture Shipping Carton Size: 12 L X 10 W X 6 H