Personalized 4th Birthday Fire Truck Baby Bib. 4th Birthday Fire Truck - This cute fire engine is wearing a firefighter helmet and bringing in a big red four for your fourth birthday! 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"