The pretty striped hat for sweet babies worked in the round

Size: 0-6 (6-12) months
Head circumference: approx 40-43 (44-47) cm / 16-17 (17-18.5)’’
Hat measures approx 17.5 (22) cm / 7 (9)’’
Materials:
DK weight yarn, 10 (20) g green yarn, 10 (20) g blue yarn, 10 (20) g white
Circular needle or if you prefer socks needles size 3.0 mm/US 2½ or size needed to get 28 sts x 30 rows = 10 x 10 cm / 4’’x4’’.