I know I chose M when I ordered bc Im 52 it said hurry one left - I even paid the extra $3.99 and i did not receive any notification they were changing the size.  So yes fits smaller because i ordered a bigger one.  The product would probably have gotten a 5 but i ordered a Med and its a Small the Crotch is down about 2 and its hard to stay crouched in, but I need it for a charity event tomorrow morning.  Ive had numerous morph suits so Im not new to this if it says 5 foot go to the next size.  Guess it will now become stirrups bc I have no other choice.  I would have rather been told they no longer had my size and bought one I could wear with ease since I am doing a polar plunge in it