Im a big guy but normally Im comfortable in a 3X shirt. So, that is what I ordered the first time. Shirt was skin tight which I don't care for at all. Went back and looked at the sizing chart and measured myself and saw that I should have ordered a 4X going by that as a guide. Ordered the 4X and the fit was exactly the same as the 3X. Too small ! Compared the the 2 shirts (holding them up together) and could find absolutely no difference in the 2 other than one was marked 3X and the other 4X. I really like the pattern and the the look of the shirt. Do I risk ordering the 5X or am I just going to be disappointed a 3rd time ?