Andy
I'm 5'6", 150# and a thicker barrel chest/lat sizing. I ordered a small. It fits over a button up and undershirt perfectly. The shoulder seams line up with my shoulder points. Chest buttons close exactly how I want them to. Arm length is good. A little tight to button at the wrist that may have a watch on it. Overall 7/5 stars. The color is reminiscent of the Mercurochrome my dad used to put on my cuts. Awesome.