After reading reviews about the fit, I ordered a size down.
I usually wear a medium t-shirt if it's a regular size and a large t-shirt if it's tight. I ordered two of these in medium size and they fit me the way I like them.
Pros
I got this working...exactly what I was looking for.
Cons
The material is quite well thought out and larger than my husband normally expects to be XL. The color was good. sent back.