I got a medium to ensure it wasn't one of those sizing exceptions I read about with this seller.  I wanted a loose, drapey fit.  I'm 5'1", about 115lbs; the shirt goes down to my thighs and definitely has a loose, drapey fit.  The material is light, not so much tshirt-y.  It's a fun,comfy shirt.  Can't wait to wear it with my skinny jeans,leggings and boots.  This is a great buy!  To ensure a loose fit, I would recommend going up a size.