Personalized Physics Heart Baby Bib. Physics text with a large P and a heart dotting the i in physics is a fun gift design for students, teachers and physicists at birthdays, holidays, 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"