The Alder Force is a truly affordable way to get you hooked! The Alder Force board is lightweight and manoeuvrable, with a crescent tail design so you have greater control and a hard slick bottom for speed!* Lightweight and manoeuvrable* Controlled crescent tail design* Hard slick bottom for speed* Wrist leash included We say: 36" is the smallest size we sell and popular with kids under 10. Anyone over 10 will get more value out of the 39" and most adults choose the 42" (bigger men may want to consider a 45" heavier board).