I bought the medium and it fits pretty well, except I can't button the bottom buttons, it's too tight.  I wear a womans size 10 or 12 pants.  That's no big deal because I don't need to button them anyway.  The quality is good and I feel like it will last a long time.  It's a nice alternative to just wearing an apron while cooking.  I usually manage to spill or get something on part of me that the apron doesn't cover.  Another plus for the chef jacket, and I think someone else mentioned this, is is does make you feel like a chef, makes you more inspired to cook.