The miniband set includes the strength "Extra Strong." The minibands are extremely versatile, lightweight, and portable. The miniband loops fit in your gym bag and can be taken anywhere. Use the minibands at home, in the gym, on the sports field, while traveling, or in the box. Perfect for warming up the thigh, core, and shoulder girdle muscles. Light, effective, and portable. Due to their small size, the minibands are extremely versatile and can be used anywhere. Dimensions of the miniband loops: approximately 22 cm x 5 cm.