Frosty hat is unisex seamless hat knitted bottom up.

Sizes:
Head circumference 46–48 (50–52; 54–56; 58–60) ?m /18–19 (20–20.5; 21–22; 23–24) inches.

Gauge:
24 sts and 30 rows/rounds = 10x10 cm 4x4 in, in stockinette stitch, using 3.5 mm US4 needles, after blocking and stretched.