SuperiorBand® Professional Stretching and Strengthening System High Quality Natural Rubber Loop with no Latex Additives. Micro-Ridges for Superior Grip. Developed for Stretch Training used in Ballet, Dance and Gymnastics. 45 inches long when flat, 90 inches in circumference. 1-1/2 inches wide so it won’t cut into your body or feet. Easy to wrap around feet or hands to shorten the length if needed. One size fits all.