Gauge
In ribbing st pattern with US 4/3.5 mm needles:
16 sts and 8 rounds = 2 X 1 inches
 
In ribbing and cables st pattern with US 7/4.5 mm:
16 sts and 7.5 rounds = 2 X 1 inches

Materials
166 (185, 206) yds or 152 (170, 189) m of worsted yarn.

Sample shown in:
Malabrigo Worsted (100% Merino Wool 100 gr 210 yards/192 meters) color 504 Rattan.

Notions:
Cable needle
One stitch marker
Darning or tapestry needle

Needles:
one 16” US 4/3.5mm (OR longer, for Magic Loop OR one set of double point needles)
one 16” US 7/4.5mm (OR longer, for Magic Loop OR one set of double point needles)
one set of double point needles US 7/4.5mm
Or any size to obtain the gauge

Sizes: Teens and Adult S, Adult M and L

Finished measurements:
Head Circumference: 19 (213/8, 23 3/4) inches
Depth: 9 (9, 9) inches