I want to make this adorable GRACE Beanie
for an infant (about 6 weeks old). The sizes on this pattern chart are given by the "inches around" of the head you're knitting for, ranging from 16" heads, all the way up to a 23" head.
Ideally, I'd like to make this to fit an average 3-6 month old
, since the baby will be nearly 3 months old by the time I can get it made and sent to her. Which head size should I use?