I'm making my own hat; nothing complicated. It will be a 1" 1x1 rib, then stockinette stitch for the main body, using worsted weight yarn. I noticed that for the patterns I've looked at, the CO's are in multiples of either 4 or 8, and I would assume this is so the decreases are even. Can anybody please tell me if I should CO enough in multiples of 4 or 8?
It probably doesn't matter, you can CO in any even number of sts, 6 - 10 -12... For the decreases you would just adjust the number between the k2togs so it comes out even.