Photo: Peter Rosa

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Sierra, 25 | Body Type: Long torso
Bathing Suit Drama: Since once-pieces rarely fit her tall frame, Sierra usually sticks with bikinis. But she needs to be mindful of proportion, as anything skimpy—like her flimsy before suit—looks even skimpier on her: "I like suits that aren't too revealing," she says. "You can be sexy without showing too much."

Happy Ending: A striped bikini top adds curves to Sierra's straight figure, while high-waist bottoms visually shorten her torso. Bonus: The retro-inspired look is a big trend this season.

Top $23, and bottom, $23;