So here's my pattern
. My uncle has an enormous head, so I want to make this bigger. Plus I'm a tight knitter. I don't want to buy bigger needles, because I'm totally broke. I want to just add more stitches. It says to cast on 84. Can I just add more stitches? What does it need to be divisible by? How should I add more rows to make it longer?
Thanks in advance!!!!