The Adult GBox includes a velcro belt and two 6″x6″x6″ (Large) G boxes. The belt is designed to fit young adults, adults, seniors, and more professional golfers with a minimum size of 28 inches and maximum size of 52 inches around the waist. Please measure your waist above your hip line. One box has a white stripe and each is made of versatile neoprene. A velcro attachment on the back of the boxes enable you to attach it to the belt at your seam line.