Combat Maneuver Bonus

Each character and creature have a Combat Maneuver Bonus (or CMB) that represents its skill at performing combat maneuvers. A creature's CMB is determined using the following formula: CMB = Base Attack Bonus (BAB) + Strength modifier + special size modifier The special size modifier for a creature's Combat Maneuver Bonus is as follows: • Fine –8 • Diminutive –4 • Tiny –2 • Small –1 • Medium +0 • Large +1 • Huge +2 • Gargantuan +4 • Colossal +8 Some feats and abilities grant a bonus to your CMB when performing specific maneuvers.