A heavy mace has a larger head and a longer handle than a normal (light) mace.
One-Handed Melee Weapons
|Cost||Dmg (S)||Dmg (M)||Critical||Range||Weight1||Type2||Special|
|Mace, heavy||12 gp||1d6||1d8||x2||—||8 lbs.||B||—|
Pathfinder RPG Core Rulebook. Copyright 2009, Paizo Publishing, LLC; Author: Jason Bulmahn, based on material by Jonathan Tweet, Monte Cook, and Skip Williams.