Size modifiers

they could work like Div except each size larger adds 10% damage but adds a 5% hit reduction. Being smaller has the opposite effect lower damage but easier hits.
my suggestions:
Very Small - gnome,elemental (im under the impression gnomes are like garden gnomes and not like gnomes in dungeons and dragons)
Small - dwarf Goblin halfling
medium - elf dark-elf half-elf human
large - saurian drakeblood
very large - Half-Orc
promotes more thought into character creation and viable content later