Reduce Person

This spell causes instant diminution of a humanoid creature, halving its height, length, and width and dividing its weight by 8. This decrease changes the creature's size category to the next smaller one. The target gains a +2 size bonus to Dexterity, a –2 size penalty to Strength (to a minimum of 1), and a +1 bonus on attack rolls and AC due to its reduced size. Melee and ranged weapons used by this creature deal less damage. A Small humanoid creature whose size decreases to Tiny has a space of 2.5 feet and a natural reach of 0 feet (meaning that it must enter an opponent's space to attack). A Large humanoid creature whose size decreases to Medium has a space of 5 feet and a natural reach of 5 feet. This spell doesn't change the target's speed. Reduce person dispels enlarge person.

Reduce Person — Spells — Pathfinder: WotR Database