The problem I have with J Crew and Banana Republic slim fit shirts is that while they cut the body slimmer both companies left the neck size the same as their regular cut.  Since I have a 15 neck and 34-35 arms the body fits ok but the neck size in their "large" shirts is 16 to 16.5 so I have way too much space around the collar.  I've tried medium tall which they don't offer much of and while the neck and body width are ok, the arms and body length are way too...