Size: S: head circumference 50-55 cm. M: Head circumference 54-59 cm. Gauge: 19 X 38 stitches = 10 x 10 cm in bubble pattern Recommended needles: 4 mm, 40 cm. 80 cm for magic loop or double-pointed needles when the circumference becomes too small Yarn: DK Sock Usage: 1 skein (There is plenty of yarn left to make a large beautiful pompom.