I know that estimates of one of Karsa's "Progenitors" (An ancient Thelomen Toblokai Teblor from their prime) have the height as near 22 metres (The "Demon" in the pit from "Chain of Dogs" or "House of chains"?), but I'm not sure as to whether he'd be massively larger/taller than the Scotsman (Who I'd estimate is around 2.2 meters tall at a wild guess).
We know that a Toblokai child is the same size as an adult human male of average size, but The Scotsman is much larger than most humans, so the size difference while in Karsa's favour is questionable in its degree (And ability to affect a fight due to range).
