Knee Support Used as an Osgood-Schlatter support. Free size I have been using this series for many years, but this one was only used 3 or 4 times and is in good condition, as I retired soon after purchasing it. My son used this same size support from junior high school through high school graduation. The size can be adjusted widely. Provides a comfortable fit with level 2 support for the elbow. - Brand: McDavid - Size: Approximately 39cm - Model Name: M414 - Level: Level 2 - Color: Black