This pattern calls for a multiple of 10
Obviously you need to know how knit a two colors brioche stitch.
Yarn: 1 ball of Light Color (LC) and 1 ball of contrasting Dark Color (DC) , each ball is 100 g, 220 m, gauge in stockinette stitch: 31 rows and 23 stitches for 10 cm
Needles: circular needles size 3.00 mm + tapestry needle
Gauge: 10 cm = 45 row and 17 stitches in a sample of brioche stitch knitted in the round
Sizes: Adult hat circumference = 54 cm, height = 23 cm /// Child hat circumference = 44 cm, height = 18.5 cm
You will need a stitch marker to place at the beginning of the work, and a pair scissors.
Increases are done with the DC yarn, in even rows
Decreases are done with the LC yarn, in odd rows
The cast on used is two colors long tail cast on