Here is a one ball knit hat in the lovely Debbie Bliss Fine Donegal yarn. The brim is knitted sideways in a great cable and bobble pattern, with the crown stitches picked up and worked afterwards.

It is in one size to fit the average adult and is knitted flat. There are written and charted options for the cable pattern. The shade shown is Fucshia and it uses 3.25mm / US 3 needles.