Two numbers definitely order more!

As you can read in other reviews already, you should use the swimsuit necessarily two sizes larger, then it fits. It is well made and looks like shown, only ever occurs when going to the pool to the effect that the skirt inflates and floats on top, which is obviously not so convenient, but not likely to be avoided.
My daughter was very happy about the swimming dress anyway, and I think especially the UV-protective good.