Personalized Monkey Big Sister Newborn Layette. Big sister Newborn Layette - White with adorable little girl monkey ballerina in a pink tutu and ballet slippers holding a bouquet of flowers says I'M THE BIG SISTER. 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