Personalized Big Sister Comic Book Baby Bib. Big Sister! Pow! Cool! A big sister is like a superhero, watching out for her little siblings. Cute gift for any big sis! Our Baby Bib is rated high in convenience and durability and with a variety of fashionable colors, your baby can be trendy. Mix and match to any outfit. 100% cotton ring spun combed heather colors are cotton-poly. Width 7.75", Length 11.75"