Size

– This option at the moment is not present in Blender 2.8 Beta

– In blender 2.79b sets the size of the particles.

– It’s the same parameter you find in Halo, Line, Path, Object, Group and Billboard.

– In this example the ‘Size’ of the cubes was set to 0.1

– On the right you can see how the ‘invisible’ cubes (visualized on the right using Object) kill the green spheres .

[download .blend]

– Here the ‘Size’ of the cubes was set to 1.0

[download .blend]