Love this hat!
I'm bald, and I have a rather small head to begin with, so finding a hat that fits is difficult at times. Many times, if the store has a "small", it's way too big. In this case, their small is the exact size of my head, so it fits correctly. It's just tight enough that it won't blow off my head, but isn't too tight were is feels like you are getting your head squeezed.
Besides the fit, the hat itself is lightweight, nice and airy for hot days, but still shades my head really well. The strap is nice too, so if it ever does blow off, or get knocked off doing anything, it stays around your neck.
It's very well made, and I expect it to last for years to come.