Personalized Unicorn 4th Birthday Baby Bib. A cute unicorn with wings, a colorful mane and tail, and wearing a gold crown stands on a rainbow by a golden 4. Cute 4th birthday gift. 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"