Truform Men's Dress Knee High Support Sock, 30-40 mmHg, closed toe box, navy nylon-spandex rib-knit fabric, soft non-compressive top, knit-in heel, size Large, 9.75" - 11" (24.8 - 27.9 cm) ankle circumference, 15.5" - 18" (39.3 - 45.7 cm) calf circumference, up to 17" (43.1 cm) length to knee.