Use knitting needles in a contrasting colour: this makes it easier to see and count your stitches, even with the fluffiest of yarns. So if you’re working with a pale colour like with the yellow chick ...
Purl 15 rounds. Knit until hat measures about 15 cm from cast on edge. (You may need to adjust this to match the distance from just above your eyebrows to the top of your crown.) ...