When you make a [[High Jump]], you leap into the air a number of feet equal to 3 plus your [[Strength]] modifier (minimum of 0 feet) if you move at least 10 feet on foot immediately before the jump. When you make a standing [[High Jump]], you can [[Jump]] only half that distance. Either way, each foot of the jump costs a foot of movement.
You can extend your arms half your height above yourself during the [[Jump]]. Thus, you can reach a distance equal to the height of the [[Jump]] plus 1½ times your height.