Do Swimsuits Stretch Out Over Time? Yes, as it is with every other of your wears, swimsuits when worn for a very long while do stretches out and when this happens, your bathing suits may no longer hug you the way it used to be when you first purchased it.

Should you size up in bikini bottoms?

“Swim fabrics stretch a bit when wet, so sizing down or staying true to size is better when you're spending most of your time in actual water,” she says. “If you're staying dry most of the time, sizing up could help you feel more comfortable since the natural stretching won't happen when the suit stays dry.

How do you know if your bikini bottom is too small?

A soft ruffle along the seam further diminishes the indent you may get whenever a bottom is tight in the wrong spots. To make sure your fit is right, tug fabric away from the skin — two fingers should comfortably fit between your skin and the fabric. Not sure whether a suit is too tight?