Never ever bought a short sleeve button up before in my adult life. The size was a lot bigger compared to long sleeves on the site. Maybe should have bought a size or two smaller. the shirt looked really good though. Gave it to a buddy of mine who is much bigger and muscular. Told him about the site and he should be doing a lot of shopping here soon. It looked better on him than the mannequin, going to do some pushups now to try and keep up