I am 6'0'' and 170 pounds and (in a size L) the shirt was too small after a wash. The sleeves, in particular, were comically short. I offered the shirt as a gift to my friend who is 5'9'' and 165 pounds and it was still marginally too small on him. You should not purchase these shirts if you are these heights or weights. Still, I leave five stars because the quality of the shirt is top notch, and, ultimately, this sizing mistake is my own error due to a lack of research. Do not make my mistake!