All sizes have 4 rows for smocking. It has 3 buttons in the back and secure plastic snaps in the crotch. The fabric is made from easy care 65% polyester, 35% cotton batiste. Machine wash warm, tumble dry.
Length of center back to crotch: NB - 14.5 in. 3 month - 15 in. 6 month - 15.5 in.