so I'm 5'6 180 lbs my measurements are 40-34-42. I am normally between L and XL and I ordered XL in this and I'm glad I did because I think Large would have been too small up top but the only thing is that it is a little loose in the stomach/hip area. Not super noticable but I can feel it, havnt worn it yet but the material may bunch a bit when I walk in that area.. Now granted I don't have a large behind & I'm not super hippy so if your more curvy you may fill it out better. I'm considering getting it in white as well. The dress is long so if your short you may have to get it hemmed if you can hem this material and I have long legs with a natural 32.5 inseam. Hope this helps.