I normally have an issue with finding a hat that fits. Every hat of this type that I find is too shallow. They'll sit atop my head like a sheet of paper.

This hat, however, is so deep that it's almost comical. The straps on the side do adjust the size, but there's only so much they can do. If your hat size is larger than an XL, you may fit into this fine. But for me, it was the first time I've ever found a hat that was too big.

Also worth noting is that the material is thin. You can see right through it if you hold it up to the light. I imagine it would be good for warmer weather.