Skills required:
Double crochet, Slip stitch, Back post double crochet, Front post double crochet.

Materials:
Yarn - Color City Sofit (45% - wool, 55% - silk) - 100 g/ 415 yards per skein (1 skein)
or any Super Fine weight yarn size 1.
U.S. C/2 ( 3 mm ) crochet hook

The description is given for circle of the head:
toddler (18-19 inches head circumference)
child (20-21 inches head circumference)
adult (22-23 inches head circumference)

Gauge: 12 dc - 2 inches