Personalized Sweetest Big Sister Infant Romper. Who's the sweetest big sister? Cute Infant Romper - White with adorable smiling cupcake with pink frosting and red cherry on top says SWEETEST BIG SISTER. Meet your new favorite outfit! Keep dressing simple with this one piece, lap shoulder t-romper. Super soft and perfect for baby's sensitive skin. 5.5 oz. 100% combed ringspun cotton premium jersey (CVC Colors are 60/40; Heather is 90/10 combed ringspun cotton/polyester)