I’m a fairly new knitter. I’ve seen a lot of cute kids hats, and I’d like to knit some hats for my toddlers. I knitted one on double pointed needles, and I really didn’t like the double pointed needle experience very much, so I want to try circular needles now. I’m confused as to which length one should use. I want to knit a hat that is 20" in circumference at its widest. The circular needle options I saw at the store were 16" long and 27" long. So do I go shorter or longer? What’s the rule of thumb?
Also, from what I understand, I’ll probably have to switch down to double pointed needles once I’m far enough into the decreases for the top. How do I know when it’s time to go to double pointed?
Thanks in advance!