This hat is knit in the rounds. The brim is worked in 1 x 1 ribbing. The main body is worked in knit and purl stitches creating diamond shape design. Pompom on top is optional.
If you prefer longer hat, add an extra pattern repeat before the decrease rounds.

Yarn:
KnitPicks Felici Worsted (75% Superwash Merino Wool, 25% Nylon; 218 yards / 100 grams)
1 skein Baker Street 27397
Or any Worsted weight yarn.

Yardage:
130 – 150 yards / 119 – 138 meters (small), 160 – 180 yards / 146 – 165 meters (medium), 190 – 210 yards / 174 – 192 meters (large)

Finished Hat Size:
16.5 (18.5, 20.5)” circumference x 8” (9”, 10.25)” high.
42 (47, 52) cm circumference x 20 (23, 26) cm high.