I have a big head, I wear a L-XXL FLEXFIT and the fit is perfect. Low profile, tight enough to stay put, loose enough not to give me a headache ( shaved head.) I liked them so much I bought several.
I ordered this hat because I have long hair and drive a convertible. I wear sunglasses a lot and I don’t like pulling up my hair low as it interferes with my headrest. This was the perfect hat for me!
The notices just didn't line up with my glasses so it didn't work for me. However might work for others .
Fantastic hat, i usually get flex fit but they stretch out after a year or two, so figured i would get the adjustable. Only thing i find with adjustable is they aren’t as deep as flex fit so that takes some getting used to.