Underbust is 38, waist is 34, and my hip is 45. I got an xxl according to the size chart but I should have ordered a size down. There is a lot more stretch in the fabric than I would have wanted but its also ALOT cheaper than my other waist trainer. Im able to put it one last row of hooks so I won't be able to adjust it any smaller. At the same time it does hold the giggle very well.