Personalized Big Brother Newborn Layette. Big Brother! A cool T-Rex big brother dinosaur stomps around letting everyone know he's the king! Fun gift for any big bro. 100% combed ringspun cotton 5.8 ounce 1×1 baby rib sleeper. 3/8" flatlock binding at envelope neck and cuffs. Back sleeve flap to protect hands. Elastic opening at bottom. Infant: 0-3 Months