I wear a size 8 but that's when it sits a couple inches above my ears. Started by ordering the black Flexfit 2x, the 3x (big head brand), and the Flexfit 4x to see which fit best then mail back the other two. The 4x was too big (I could tuck my ears in the side). The 2x was verging on too tight but would have worked. I picked the 3x cause it gets hot here and the Flexfit hats were structured panel and seemed like they'd be pretty hot for all day use. The 3x unstructured hats are comfortable like a old pair of blue jeans and more cloth like. The Flexfits are stiffer and make you about 2 inches taller. I bought these for work use since the job gives those one size fits all- which if you're reading this you know that's a bunch of crap.
Reviewed by: Chris S. from Texas.