Personalized Patterned Ohm Symbol Baby Bib. An ohm symbol with a black and gray pattern is a unique gift design for electical and computer engineers and engineering college students 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"