Personalized 4th Grade Back To School Baby Bib. Team 4th grade Baby Bib - Blue and White back to school gear for students and teachers. 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"