Hey guys, I've never purchased a Gitman shirt, but I wear a M in BoO, what is my recommended sizing? Also, would the white GV button down work as a dress shirt? I think you'd be a small too like MSSneaker said the neck will be tighter. I don't think it would work as a dress shirt with a suit. The white shirts are oxfords which are more for business casual. I think they will work well tucked in with khakis/chinos and maybe a tie, but not for more formal settings.