Size Damage

[piemaester]

Can someone tell me the damage progression as a weapon increases in size, starting with 2d8 for a medium weapon. This thing is getting pretty big so I need up to colossal.

And what would it take to wield a colossal crossbow as a medium creature?

THANK YOU!

[Tyger]

The SRD is your friend. Weapon Sizes (http://www.d20srd.org/srd/equipment/weapons.htm#weaponSize)