Pattern is seemless and worked in the round. There is a chart with suggested stitches fit the toe shaping. These are only suggestions your numbers may vary.

Small fits shoe size 5 or 6 sole measures 9”,
Medium fits shoe size 7 or 8 sole measures 9.75”,
Large fits shoe size 9 or 10 sole measures 10.5”, XL fits shoe size 11 or 12 sole measures 11”