Hiatt

Photo: Ben Goldstein/Studio D

"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: Small

Erin 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.
athletic

Photo: Marko Metzinger/Studio D

Body Type: Athletic
A ruched tankini adds curves—and stays put when you're swimming.

Boden top, $44, and bottom, $34, bodenusa.com.

Photo: Marko Metzinger/Studio D

Body Type: Pear Shape
A miniskirted one-piece covers thighs.

Ella Moss, $40, tjmaxx.com for stores.
swimsuit

Photo: Marko Metzinger/Studio D

Body Type: Big Bust
All the tops in this line are sized like bras.

Panache top, $59, and bottom, $32; barenecessities.com.
athletic

Photo: Marko Metzinger/Studio D

Hot launch!
Kamalikulture, iconic swimwear designer Norma Kamali's new collection, is all under $100. Top, $48, and bottom, $52, available 5/25 at amazon.com.
plus size

Photo: Marko Metzinger/Studio D

Body Type: Plus Size
Shirring and a power-mesh lining minimize the tummy area.

Ocean Dream for QVC, $78, qvc.com.
swimsuit

Photo: Marko Metzinger/Studio D

Great Idea: Switch the Straps!
Switch the straps!

Get four bikinis for the price of one: Itsykini suits come with removable, interchangeable straps.

$145, extra straps, $16 to $24 each, itsykini.com.

Next: 35 ultraflattering swimsuits for every size and shape