Personalized Assistant Principal vintage Baby Bib. Assistant Principal Baby Bib - White and Blue has vintage style design that says premium quality grade A asst principal. 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"