I use the baby soft yarn, i think it's 3 ply on the smallest knifty knitter for preemie caps. If you use a regular yarn, or even a sport weight, the hats come out kinda stiff, and you definitely don't want them stiff if you're looking to make preemie caps.
I can get just about 3 caps out of a...
I have 2 sets of the rounds, plus a straight one. They're much cheaper at Wal-mart.
They're fast and fun. I can make a premie-sized hat in about 45 minutes to an hour, full sized hat, maybe 3 hours. The rounds can be used to make scarves and everything. I love mine.
The hooking tool used...