Personalized Superhero 7th Birthday Baby Bib. Happy 7th birthday! Celebrate your child's seventh b-day with a cool SUPER 7, superhero gift. Happy Birthday seven-year-old! 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"