I'd use the SRD Equipment version, it should be the "correct" one.
From the SRD:
Table: Tiny and Large Weapon Damage
Medium Weapon Damage Tiny Weapon Damage Large Weapon Damage
1d2 — 1d3
1d3 1 1d4
1d4 1d2 1d6
1d6 1d3 1d8
1d8 1d4 2d6
1d10 1d6 2d8
1d12 1d8 3d6
2d4 1d4 2d6
2d6 1d8 3d6
2d8 1d10 3d8
2d10 2d6 4d8