This suit is a 16W.  I tried it because the sizing info was close to my measurements just an inch or two bigger.  I have been struggling to find a suit to support my large bust so I thought I would give this a try.  I wear a regular 14 in all of my clothing, but have not had luck in this size with suits.  This suit is still a bit loose, but better than most I have tried in my size.  It has adjustable straps-a MUST!  I hope this helps someone?