Thank you for viewing! This is a baby collar in a pale gray with a striking yellow. I think it can also be used as a bib (^^) The neck circumference is approximately 30cm. I think you can use it with a size similar to a general bib. It was just the right size for my 3-month-old daughter (^^) Since there is a ribbon, some length adjustment is possible! The yarn is 100% cotton. Instant purchase is available. *This is a handmade product, so I make it carefully, but there may be some imperfections. Please purchase only if you understand this. Please note that returns and exchanges are not possible.