This simple cabled hat is knitted in a long rectangle, and then seamed at both sides. It's a great beginner cable pattern, as there's no shaping to worry about.
Size To fit head circumference 50-55cm (19.5-21.5in)
Also required Cable needle Card for winding pompons
There are just two cables to master, and the pdf pattern includes a link to a good cable tutorial if you've not tried cables before. There's also a link to a pompom tutorial, on the off-chance that you've forgotten how to make them the old-fashioned way. You could of course equally use a spangly new pompom maker.
I've done both a chart and written pattern for the cable, so both sides of that debate are fully catered for. It's not a complex cable, but I really liked the effect on the finished fabric.