Personalized Worlds Best Coal Miner Daddy Baby Bib. childs coal mining themed occupation quote says my Dad is the worlds best coal miner 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"