Personalized Royal Trombone Teacher Baby Bib. Trombone teacher text wearing a crown and a trombone drawing is a humorous design for your trombone teacher at back to school and graduation. 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"