This peanut-shaped ball can be used like a traditional hi-hopper jump ball but the peanut shape makes it easier to sit on. It can also be used as a dynamic seating option (like a gym ball, just turn it around) AND it can be used in the way we often use peanut balls in therapy, eg on your tummy. Very versatile and inexpensive option.Size: 50cm(L) x 32cm diameter. Maximum user weight: 80kg.