These are hands down the best bike bibs or shorts for kids out there! Both my kids have them and they fit amazing, they are so comfortable, and wash up perfectly. We will be buying more! For size reference my 10 year old is wearing a large, and my 5 (almost 6) year old is in a small. I hope they make more of these in different colors and more jerseys too, we will be first in line to snag them!