Reviews say order two sizes up which seems to be true BUT 4x is max size and chest is at least 2" from clasp and the belly 5" from the attachment. Luckily I have a tailor who can change the back so I can wear it to an event next month. The buttons on the cuffs need to be moved significantly as they fit a radius wrist a two liter soda bottle I'm a little tired that the Revain dress sizes aren't true.