Personalized Boys Math Dark Products Baby Bib. Boys rock at math in blue and red text is a fun design for students and teachers to promote enthusiasm for mathematics. Unique gift design for 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"