beautiful dress 😍😍 I was a little confusing at first, but I got the hang of it after a few minutes. I'm 160 lbs, 5'7. I ordered a size Small because I didn't want it to fit loose. I don't have a belly or big back and my bra size is a 34B. that's why I sized down. if you have a little bit more fat on your rib side size up or stay with your normal size cause the zipper is on the left side of the dress. if the dress feels loose in the back u can tighten the straps more to make it more secure. wished they had more colors!!!