Objects of different sizes

Hi,
I’m fairly new to the A* pathfinding, and I couldn’t find a way to set agents sizes (objects with a seeker component). The only think somewhat close is the grid collision size, which uses the same size for all the agents in the scene (which doesn’t work for me).
Is that possible ?

I’m curious about this too.
My scenario is that my boss units are maybe 3x the size of a regular unit, and he easily gets stuck on pillars and corners because the path the seeker picks doesn’t take into account his width, so he ends up with a node in his path that he can’t actually reach… any thoughts?
I’ve considered the radius path modifier, but that is a pro only feature I’m not sure that would actually stop the unit from going down a corridor it can’t fit in.

@Alistar:

http://arongranberg.com/vanillaforums/discussion/1552/different-ai-units-size-problem