Measure Waistline: X-small 24-27 (Boys) / Small 28-32 / Medium 33-36 / Large 37-40 / X-large 41-44 / 2X 45-48 / 3X 49-53 / 4X 54-58 / 5X 59-63 Snug Fit for support. Also worn as inguinal hernia prevention brief and for scrotal support. Special pouch crotch offers total comfort and stability. Fly opening for convenience. Cotton crotch Internist inspected and recommended. Proudly made in the USA The feel of microfiber and the stretch and fit of spandex are merged together to conform to every curve of your body and fit you like second skin. Cut for very snug fit and and support. Our pouch crotch is perfectly contoured for comfort and support. A fly opening makes for convenience. Made in USA.