Groundfighting
Prerequisite: Improved Grapple, Improved Martial Arts
Benefit: You are always treated as though you were one size larger than your opponent when grappling, to a maximum of two size categories. e.g. if you are Small and you're grappling with someone who is Medium-sized, you're treated as though you are Large. However, if you were Medium-sized as well, you would still only be treated as though you were Large. If you were Small and your opponent was Large, you would also be treated as Large. However, if your opponent were Huge, you'd still only be treated as Large.