Get swim trunks with 4-way stretch and a 5-inch inseam.

Yes. You need stretch and a shorter inseam — that’s the combo that fixes the “thigh squeeze, waist gap” problem.

Regular boardshorts are cut for dudes with straight legs. If you squat or cycle, your quads push against the fabric, and either the waist is huge or the legs are painted on. 4-way stretch (usually a nylon-spandex blend) gives without looking like a wetsuit. A 5- or 7-inch inseam keeps the trunks from ballooning out like a skirt when you swim.

Look for an elastic waistband with a drawstring — not a button-and-zipper fly. That lets you adjust for the thigh-waist mismatch. Brands like Chubbies, Nike (their Flex models), and Birdwells (if you want something tougher) all work. Avoid anything labeled “classic fit” or 100% cotton.

You don’t need to spend $100, but don’t grab the $15 special from Target unless you try them on first. Stretch and a short inseam are non-negotiable.