DESC: Features Knitted elbow support incorporating 2 anatomically contoured silicone inserts surrounding the medial and lateral elbow bones (epicondyles) and lying over the flexor and extensor muscles Silicone inserts help leave the elbow bones pressure-free and help provide an intermittent compression to the soft tissue of the joint, leading to increased circulation, thus aiding in the resorption of swelling and edema Helps promote proprioception, thus heightening sensory awareness in the elbow for increased joint stabilization Graduated compression at the edges prevents constriction of circulation Lightweight, breathable knit will not retain heat and is completely machine washable Size: Circumference in Inches 0: 6 1/2 - 7 1/2 in. 1: 7 1/2 - 8 1/4 in. 2: 8 1/4 - 9 in. 3: 9 - 9 3/4 in. 4: 9 3/4 - 10 1/2 in. 5: 10 1/2 - 11 1/2 in. 6: 11 1/2 - 12 1/4 in. Size is determined by loosely measuring the circumference of the arm, with the arm slightly bent, at 43/4 i