“For example, if someone who carries more volume in her shoulders and wants to elongate their legs while minimizing their midsection, I would suggest going for a cheekier bottom that is high waisted, because that will elongate the legs and shorten the torso. However, if you have a shorter torso and want to elongate it, I suggest choosing a lower rise.”
She adds, “If you have broader shoulders, opt for thicker straps to soften the shoulders. If you want to emphasize your shoulders, choose a swimsuit with thinner straps, a halter neck or one that is strapless. If you want to focus on elongating your upper half to have a better posture…that will help you appear taller, go for a V neckline in your bathing suits.”
To play up your vertical lines, I’ll add that you should seek out styles with vertical stripes and cutouts (like the ones linked above), or diagonal designs. Belted or cinched-waist swimsuits are also flattering for petites, as they help accentuate curves and keep your torso looking proportional, rather than blocky and compact.