I purchased a M because the reviews said it run big . but I have big breast 38DD and the M was just a lil too tight. I returned and got a L. the material is thin but comfortable. If you are big breasted I recommend you sick to your size

I'm 5'8 1/2 I have a long torso so itfits perfect, I usually fitXL its just the right length in arms , only thing about shirt it's not as bright as this picture it's like my shirt was washed , but I like the shirt