Colossal-sized PC's?

[the Jester]

That doesn't work, though. From righteous might: "Multiple magical effects that increase size do not stack."

Hmm, maybe in a 'psionics are different' campaign...

 

[Infiniti2000]

Hmm, maybe in a 'psionics are different' campaign...

I thought even in such a campaign, it was advised to keep similar effects from stacking? If not, I'd recommend it, but then quite honestly I wouldn't recommend a 'psionics are different' campaign.