S (M, L)To fit women’s US shoe size:5-6 1/2 (7-9, 9 1/2-11)Finished MeasurementsFoot Circumference:6 1/2 (7 1/2, 8 1/2)“16.5 (19, 21.50 cmFoot length (customizable):9 (9 3/4, 10 1/2)“23 (25, 26.5) cmToe-up with a heel flap and gusset