Waist: Small: 27"-29"; Medium: 30"-32"; Large: 33"-35"; X-Large: 36"-38"; XX-Large: 39"-41" The big pouch is designed to provide support and a lift for enhanced definition even under jeans The 3-dimensional pouch is ergonomically shaped to provide amazing comfort with plenty of room T-string shaped back measuring 1cm If you want a hot style combined with fantastic comfort, this is the underwear for you