How do these fit compared to am a? Thanks Really depends on the cut. Most of my Am As are tri-blends, so I'd say a little wider and slouchier through the body and sleeves than those. Maybe a little shorter on the Alt A, since the raw hems kind of roll up on both the body and sleeves. An M is a good fit for both on me (6'1", 155, 40" chest). If you like I can give you comparison measurements later tonight (headed out the door in a couple).