This is a super easy cable hat pattern made using one ball of Cascade 220 Superwash Merino 100g/220yd.

Small to fit head circumference 20in/50.8cm
Medium to fit head circumference 22in/55.9cm
Large to fit head circumference 23in/58.4cm
~10% negative ease

Materials
-circular needle
-cable needle (any needle to hold a stitch works)
-tapestry needle
-pom pom and button if you want
-stitch markers