Moderate-stabilizing support. Side stabilizers help provide lateral support. Sleek design follows natural shape of knee. Dual stabilizers on each side of leg for added support. the Ace Brand Knee Brace with Side Stabilizers was designed to provide support to weak and sore muscles above and below the knew. It also permits movement without slipping or rolling. Provides moderate support and stabilization to help prevent re-injury and relieve symptoms associated with strains, sprains, arthritis and repetitive stress injuries. Size Selection: Measure around kneecap while in a standing position. Size: Medium: 14-1/2 to 17 inches. The Ace Brand trademark is your assurance of superior quality, support and comfort. Trusted brand since 1918. Made in USA.