The Storm Crutches are designed and tested to be heavy duty, with a 330 lb weight capacity and good for adults 5.2" - 7" tall. They are easy to adjust with a height (handle to floor) of 30"-40", and have an ergonomic handle with adjustable arm support in range 8.5"-11.5". These crutches are also lightweight but sturdy, with one crutch weighing less than 1.15 lb.