Collision size is a unit's internal size that cannot be passed through by other units. This allows units to block each other with their bodies. Most heroes have the same collision size, regardless of their graphical model. Phased status allows units to ignore collision size.
The collision sizes of units is not directly set by a number in their data. Instead, collision sizes are standardized for all units, with the use of bounds hull names.
The following hull sizes exist, corresponding to the following collision sizes (from largest to smallest)
Collision size comparison
|Fountain, Melee Barracks, Ranged Barracks, Tier 1 Tower, Tier 2 Tower, Tier 3 Tower, Tier 4 Tower||144|
|Effigy Building, Outpost||96|