depends on the button down, the chambray ones run to a normal standard fit while the plaid checker styled ones are schmediums, they run real tiny. like an xl is like most brands larges if that and the uttons all fall apart immediately, with all the "design meeting and tech packs" they supposidly have I just dont get how these elements slip by them before release. they REALLY need to step up thier game with higher quality buttons and tougher stiches in areas succecptible to breakdown ,wear and tear, tahnnnnnnn maybe we can start reconsider boasting that they are "the finest quality".