The directions explain how to calculate exactly how many stitches to use for whatever length foot.

Things You’ll Need:

• Basic knowledge of crochet (see link below)
• Worsted weight yarn 3-4 oz (less for children)
• Crochet hook size I
• Yarn needle
• Size of foot in inches

This pattern no longer seems to be available, but there are similar patterns/resources at eHow.com