**ALL ITEMS ARE NONRETURNABLE ONCE SHIPPED** Sizes Available – Prefabricated Knee BracingMeasurements taken 6” above (thigh) or 6” below (calf) mid–patella.SIZETHIGH KNEE CENTER CALFx = 1 = XS 13”–15½” 12”–13” 10”–12” (33–39 cm)(30.5–33 cm)(25.5–30.5 cm)x = 2 = S15½”–18½” 13”–14” 12”–14” (39–47 cm)(33–35.5 cm)(30.5–35.5 cm)x = 3 = M18½”–21” 14”–15” 14”–16” (47–53.25 cm)(35.5–38 cm) (35.5–40.5 cm)x = 4 = L21”–23½” 15”–17” 16”–18” (53.25–59.5 cm)(38–43 cm)(40.5–47 cm)x = 5 = XL23½”–26½” 17”–19” 18”–20” (59.5–67.25 cm)(43–48.25 cm) (47–50.75 cm)x = 6 = XXL26½”–29½” 19”–21” 20”–22” (67.25–75 cm)(48.25–53.25 cm)(50.75–56 cm)