Every review always says stuff fits too small. I usually order XS in jumpsuits on here but got a S because of the reviews. I feel like I could have sized down because it had stretch a the top and I wanted it to fit like a corset. It still looks good as a S and is comfortable. Either size would have worked I think but go with your regular size to be safe if you don’t want to return or try different sizes. I’m very skinny about 125 lbs, 34B cup, I can wear anything from a 2-4 in US size. I usually wear S in other brands but on here XS usually works.