Photo: Ben Goldstein/Studio D

The myth: Athletic body types should choose suits with ruffles and patterns for a feminine look.

The reality: There's no need to force yourself into frills. "You can wear a sleek suit—just look for curve-enhancing details like cutouts and seaming," says O's creative director Adam Glassman.

Beach Belle, $48;

Photo: Marko Metzinger/Studio D

The myth: All small-busted women need padding for an extra boost.

The reality: "Smaller-chested women can wear deep necklines and bustier tops that would look risqué on other body types. Embrace what you've got!" says Glassman.

Natori, $188;

The myth: Big-busted women should wear only one-pieces.

The reality: "A big bust doesn't mean the rest of you needs to be covered up," says Glassman. "Look for tops with extra support and adjustable straps."

Panache top, $59, and bottom, $32;

Photo: Courtesy of Kate Spade New York

The myth: A classic midrise bikini is most flattering for plus sizes.

The reality: "Bikini bottoms with side strings are your friend," says Glassman. "You can easily adjust these to avoid unsightly lumps and bumps."

Kate Spade top, $188, and bottom, $168;

Photo: Ben Goldstein/Studio D

The myth: Black is the most slimming color option.

The reality: "Gray is just as complimentary," says Glassman. "It's unexpected and actually looks better than black on blonde and gray-haired women."

Sorella Swim, $198;

Next: Sporty swimsuits for every shape