To measure for a long torso swimsuit you want to first “measure from the base of your neck to your waist,” says Bernholtz. It’s easier to do this from the back of your body and even easier if you have someone who can help you. If this measurement is 19 inches or longer, you have a long torso. Now you have this information, you can either take your trusty tape measure with you to the store and pour over the specific measurements of each swimsuit online, or you can simply shop for swimsuits marked as long torso. Remember too that there are some design details, like long-line tankini tops and super stretchy swimsuits that will still work for long torsos even if they weren’t designed with them in mind. Ultimately, it’s about how your swimwear feels when you wear it. “Any suit that feels good when you move in it and or has the option to adjust is best,” adds Bernholtz.