Believe it or not, there are a few other summer swimsuit styles you should consider moving out of your closet for good — even seemingly innocent ones. One go-to swim trend that blogger Nada Manley recommends ditching is the retro, pin-up bathing suit. Why? She thinks this style can look too costume-y and is unflattering to boot. "The trend towards retro bathing suits can seem innocent and endearing, until you see someone completely embrace another era," she said. Of course, we still love "Mad Men," but chic vintage-inspired pieces are your best bet.

The outlet also suggests steering clear of swim dresses, which can age you, and recommends short ruched bottoms instead. If you prefer a one-piece with more coverage, you can also try a sleek monokini. A "sharp, sophisticated style" is extremely flattering, and a couple of cutouts can show some skin while keeping you mostly covered.

Nexter says to forget excess embellishments like bikini shoulder pads (yes, they exist) and mermaid tails, while Who What Wear is all about avoiding "tacky" metallics and belts. 

Of course, everyone is bound to have a different opinion when it comes to "in" versus "out," so sticking to classic swimsuits that flatter your shape — and make you feel great — is your safest bet.