This one piece bathing suit by #Peddney fit me and was even a tad big on me. I generally wear a size 14-16 so opted for the XL size in this swimsuit. It said it should fit a size 12 in American sizes. I figured it mi was hot be a bit snug, but didn't think it would be a bit big! Even for me u had to adjust both shoulder straps all the way and tie it to the ht in the middle and it was still just a tad big in the side if my breast area. Thankfully I do know how to put a Dart in on t h.g e side of my swimsuits on both sides as this fixed my issue. Normally things run small not big. This is a rare occasion, and I don't know if mine was a fluke or not. But if you're planning on buying this swim suit either by the size you wear normally or go down 1 size. For $25.99 its reasonable and the bottom half of my suit fit me fine. Worth taking a chance on.