I am normally a size medium. Most of my clothes are size 6 or 8. Rarely a 10. Based on the measurements I ordered a 12 because I am busty (DD cup) and I still couldn't pull the zipper up. So returning it and I guess getting the 14. There were also tiny holes on the dress so either way I would have returned it. Otherwise it's a very pretty dress but order a size up and if you are busty at least two maybe three sizes up.