I read all the comments and thought I'd try to fit into the medium.  (In US sizes, I wear a Medium or Large).  No such luck.  This is such a beautiful shirt!  I wore it once (with spanx) and got many compliments on it.  It was just too tight to be comfortable.  I am giving it to my niece.  The company said it's releasing the larger sizes soon, but I haven't seen it yet.  Let's hope that they do.  It is well-made and beautiful.  My only complaint is the the back center seam of the blouse doesn't match up with the flower pattern.