Personalized Trombone Robot Baby Bib. A robot holding a trombone is a fun gift design for brass musicians, students and teachers at back to school, birthdays, holidays 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"