Hey Joy....

Here's a great suit that should work for small-challenged gals, it features a zipper at the top so you can vent a bit during the run/bike...but zip-up for the swim. Good support, thinning lines, excellent quality from a top-rated manufacturer:

2XU Women's Race Tri-Suit:
http://www.onetri.com/womens-race-su...9279a8b3a597d5

It says it's purple, but it's much closer to black. Nifty little outfit, actually pretty flattering too! If there is a one-piece that accomodates a "big gal"...this is likely it. Behind the zipper is a fabric band...just a great design and the vertical lines help too!