Each board has characteristics that determine how it will perform for different people. Longer boards are more stable, while shorter boards will be easier to turn. Wider boards are more stable but aren't as performance oriented. Softer flexing boards are more forgiving and better suited for smaller riders. A stiffer board is more difficult to flex and will be better for heavier and stronger boarders. In general, a board when set on end should reach a point somewhere between the rider's chin and nose. Again this is a generalization, and care should be taken to match the board to the size, strength and type of rider.