Babys Best Bonnet Free Crochet Pattern This really is an easy simple Free Crochet Pattern to follow and make a Vintage Baby Bonnet Made using 3ply (I used cygnet Kiddies Super soft) and 5.00mm/I Crochet Hook . Finished size of bonnet is 15/16 inches around so would fit baby either side of 3 months. I can make it in an hour of less, and its very easy to work once you have the pattern going.