I was hoping they'd be a little bigger, with the "up to age 10" rating. My 5 year old is very small for her age (less than 1 %ile) and it only has a bit of room to cinch. However, the chin strap has plenty of length left. I didn't realize it was a hook & loop strap, rather than tie, chin strap. That was my fault and doesn't seem to be a big issue.