Neoprene Knee Support retains body heat, offering warming compression to help reduce knee pain. Wraps around the leg, fitting the superior and inferior portions independently. You control the compression. No-slip grip liner helps prevent migration. Open patella helps stabilize kneecap. One size fits all. Fits left or right.Sizing: Fits thigh circumference up to 25", calf circumference 23", Brace is 11-1/2"L, stretches to 15". Strap is 22"L, stretches to 26".