These knotted gowns are crazy popular because it's so easy to change baby and keeps them nice and warm by simply knotting the bottom so their tiny legs are covered. These gowns are also gorgeous in newborn pictures. So simple and so comfy! Layette Details: Size 0-3 Months - approximately 27" long 95/5% - Poly/Spandex Leg opening at the bottom makes for an easy diaper change, then simply tie in a knot for a secure fit