I am 5-11, 173 pounds with a lean, muscular build.  Its hard to find dress shirts that don't leave too much room around the torso, while also keeping the shoulders "fitted". This shirt fits perfect in a size Medium for me.  I haven't washed it yet, but I don't intend to put it in the drier.  The fabric is soft and the material feels like a more expensive fabric.  Im gonna buy a few more right now!  Rock on!