Personalized 1st Day of Preschool Unicorn Back to School Baby Bib. 1st day of preschool or Pre-K design has unicorn face for a school student. 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"