"Choose the retro elements that flatter your shape," says O's creative director, Adam Glassman. "Higher-cut bottoms elongate the legs, while well-placed ruffles can camouflage everything from a smaller bust to larger thighs." And remember: A good polka dot never hurt anyone.
Body type: SmallErin Hiatt, 38, Executive Assistant Body type: Small bust
"I'm smallish in the boob area," says Hiatt. "I'd like to perk it up."
The solution: A saucy one-piece in va-va-voom red.
ABS, $111, tjmaxx.com for stores. Shoes, Tommy Hilfiger, $79, tommy.com.