Reach is the distance at which a character can attack an opponent with melee weapons, natural attacks, or unarmed strikes without having to move from their current position. This distance is typically based on the length of a character's limbs or the size and type of their wielded weapon.

A creature of Small or Medium size will typically have a Reach of 1. This means that they can attack a creature located in an adjacent square. For the sake of simplicity, we consider squares that are diagonal to be adjacent.

Creatures that are Large, or even larger, may have a greater base Reach. The typical Reach of a creature is given in the Creature Size page. A creature with Reach greater than 1 can attack foes at a greater distance.

Creatures that are Tiny or Diminutive have a Reach of 0. Creatures with a Reach of 0 must be in the same square as their target in order to attack them. Luckily for those creatures, they typically can enter their foe's square.

Creatures that are Fine have a Reach of Close. This means that their Reach is 0, and can never be improved.