Want to look silly in your swim trunks? Didn’t think so. In order to make sure your shorts don’t look awkward on you, shop for a length that corresponds with your height. As a rule of thumb, it’s best to keep the hem of your swim trunks at least three inches above your knee. Longer than that, and shorts are going to look too big on you. If you’re on the shorter side, aim for swim trunks that are no longer than your mid-thigh at the lowest point. This will help create the illusion of longer legs. If you’re on the taller side, you can let your shorts drop down a little lower, as long as they remain three inches above your knee.