I have a big head so I ordered the XL after seeing other commenters say that it fits small. The hat was still so tight that it gave me a headache! However, I stretched it out for a few days and now it fits perfectly. I'm a geologist and I wear this hat every day in the mojave sun. I love it and expect it to last a lifetime.

I echo what the last person said: hat way too small for a medium so had to return it. Too bad because it's a well-made hat.

The hat arrived today and although size Medium (I measure 7 1/8) it was like a toy hat on top of my head. Way too small. Really sturdy great hat but I think I might look for another hat with a better fit instead of trying a different size. Nice wide brim that pretty much molds to shape.

Really durable well made hat, not breathable but I know it will last me a lifetime

Great hat made of the heavy Tin cloth material. Brim's solid and construction fits the Filson name, so I expect it to last quite awhile. As the previous review states, it doesn't breath very well so it's a bit warm in the summer sun.

Great hat that lives up to the Filson name. Perfect for any outdoor activity. Ventilation isn't great, and wouldn't recommend on a hot/humid summer day. Solid brim and doesn't flop around in the wind.