Personalized Trombone Text Shamrock Baby Bib. A shamrock made from the word trombone and small shamrocks is a unique gift design for low brass musicians and music students and teachers on St. Patrick's Day and at Celtic festivals. 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"