Yaffi was committed to helping my daughter find a suit that fit. My daughter wears a 10 - 12 in youth clothing or XXS woman's clothing. She is 4' 7'' and 85 pounds. There was not an option for those sizes but we thought the 8-9 might fit. It was ultimately too small for her, but Yaffi sent out the woman's small for her to try as well when we contacted them about a return. With the straps adjusted to the smallest setting this suit fit. She has an athletic build so that helped her fill out the suit, which would be too loose on thinner teens. The suit would easily accommodate another 4 - 6 inches in height/torso length via the adjustable shoulder straps as well as those with more weight. She was very happy with the cut and material.