I recently ordered these two
Dresses from the Athleta website.

This one the the Printed Shorebreak Dress. I ordered it in the tidal blue in the regular size medium. Some of the reviews stated it can run a bit tight in the chest, so I opted to go up a size even in the non petite sizing. Because it is an empire waisted dress, I have some confidence I can make it work, we'll see!
The other dress I ordered is the Kokomo dress. This one does come in petite sizes. Again, because of the reviews, I ordered up a size, medium petite, because of chest sizing issues.

I ordered this in the vivid blue color. I am hoping to get at least one nice dress out of this order. Both of these dresses have a built in bra, that's why I am trying them out. I want to be able to just throw them on after a day of swimming and look pulled together, but not have to fuss with my foundation wear!
I'll keep you posted!