I purchased this hat at a shop for my son's first hat, and he wore it a few times during one season. I'm selling it now because he's outgrown it♪ It has an adjuster and is sized 44-46cm, but my son wore it from around 3 months old to almost 6 months old. The chin strap is a little loose, but there are no noticeable scratches or stains, and I think it's still in good condition and can be used for a while.