This is a Zexy magazine supplement: a 2-way rubber belt for beautiful posture and exercise. It can be securely fastened with Velcro. The length is also adjustable with Velcro. I, who usually wear a size L, could use it with ease. The size is 69cm long and 5cm wide (both belts are the same). It stretches and contracts, so you can use each belt separately for exercise. I used it a few times and then stored it at home. There is no outer bag or instruction manual. The Velcro is not damaged, and I think it's relatively clean. Shipped anonymously for peace of mind.