WEST ORANGE, N.J.—When Deborah Nixon heads to her local pool in her swimsuit—a pair of long black leggings and a matching short-sleeved top like surfers wear—she gets compliments and ...

Dua Lipa has been sunning herself in Ibiza wearing what’s essentially the Disney princess version of a bikini: a puff sleeve, off-the-shoulder swimsuit with jewelled detailing.