Collision size above 48

[MasterWarlord]

Is there any way to make a unit's collision size be higher than this without making it a building?

 

[Chaosium]

? Not sure where that 48 comes from, here's a footman with a collision of 150

 

[A]mun]

Also check gameplay constants:

Spoiler: pic

Can't recommend going higher tho.
Well depending on the scenario, but it gets easier and easier to block the movement of very heavy collision units, i.e. they become exploitable.