Epitact Physiostrap Knee Pain Knee Gonarthrosis Size S is a knee brace that helps provide relief and stability in case of knee pain or fragility.This thin and lightweight (< 40 g) knee brace helps preserve your vital mobility, facilitating the continuation and resumption of daily activities, discreetly and safely. Its silicone band provides good support and does not cause discomfort when walking.Size S: between 35 and 38 cm. The size is measured sitting, according to the circumference of the knee, with the tape measure placed in the center of the patella.