This is a recipe for a custom watchcap of any size, gauge and needle size determined by the knitter. Includes shorthand version to copy and keep in your phone, or on the back of a business card.
Yarn weight: Worsted / 10 ply (9 wpi)
Gauge: 4.5 stitches = 1 inch in half-twisted rib
Yardage: 180 yards (165 m)