If you are a guy that wears bikini briefs I think you'll love these. I sized down slightly to a medium, I'm a 33" waist and can run in between medium and large sized briefs. I had bought a pair in large and they were just too big. I love the soft/silky feel to the fabric. Light support but very comfortable and great range of motion with no ride up. Great fit (full coverage) across the rear end as well!