A little smaller than my similar Condor and Fox Outdoor hats. A little tight on me. I think my head circumference is just under 23 1/2 inches which should put me inside the upper end of the "one size fits most" range. I ended up returning the hat after looking in the mirror. I just happened to turn my hat backwards to look at the back and noticed that the long Velcro strip on the back wasn't straight and looked ridiculous.