Megan's Easy Crochet Baby Cardigan Free Pattern. This is an EASY Crochet BABY Cardigan Pattern. Ideal to crochet for small NEWBORN Baby. The Cardigan is crocheted all in one piece from the top down. This one pictured above was made for my newborn Grandson, using a 5.00 mm hook and Aran yarn. It fitted him perfectly just out of the hospital. When everything else seems to drown them.