I bought this hat for my 7-year-old and it barely fits. It just covers the very tops of his ears, which is fine much of the time, but won't "cut it" on really cold, windy days. My son really likes the cool flames and how the spider stands out (in higher relief than the rest of the hat), so I plan to keep it. But, I'm a bit bummed that he won't get more than one season out of it. My son probably has a big head like his father, but I would estimate that this hat would fit preschool through grade 2, and not much higher. This hat only comes in one size, so buyers don't have much choice.