Superior Stretch has the SuperiorBand as part of their professional stretching and strengthening system. This is a high quality natural rubber loop with no latex additives. The micro-ridges help prevent the band from slipping during stretches. It is used for stretch training in dance and gymnastics. It is a total of 45 inches long and 90 inches in circumference with 1-1/2 inches wide, so it won’t roll up and cut into the body or feet. One size fits all.