From pattern: “The effective arrangement of knit and purl stitches makes this all-over pattern interesting to do. Instructions are given for standard (11-inch leg) or shorter (8-inch leg) length. You will need 3 (1 oz) balls (of 3-ply sock yarn) for Standard Length for foot sizes up to 11 or 4 balls for sizes 11.5 and 12. 3 balls will make all foot sizes in Shorter Length.”