The first set of measurements are the complete flaccid and fully stretched shaft. The actual size of the garment will be shorter thereby allowing the penis to relax to some degree and fatten up for a more secure fit. If you attempt to extend to full length you will not be able to urinate without experiencing a terrific amount of pain that will literally drop you to your knees in agony. The other problem will be when you sit and the penis is forced to retract which causes the glans to slip back down inside the sleeve. Remember, the Innerwear is designed for 24/7 use in total comfort and convenience. You can train more actively with high intensity/short duration and then use the Innerwear all day during the recovery phase to heal in the extended condition thereby helping to cement gains.