Anonymous wrote:She may need to look at suits for competitive swimmers which are meant to fit tighter but I don't know about best brands or types for her proportions.
While first choice is a one piece, a two piece with a tank-style top may be her best best, and I often do well buying separates from Old Navy.
This would be my suggestion. And yes, you'll need to try a variety of brands to see what works best for your DD. Speedo, Nike, Arena, Tyr, Dolfin Uglies, Jolyn...all brands that my 5'6" 14yo competitive swimmer has tried. Speedo and Nike work best for her, but her teammates practice in all of those brands. If you're anywhere near Arlington, Sport Fair is a great place to be able to try a variety of suits.