I have made a particle collider but it is really small and the only thing i can figure out how to increse in size is the textures being produced and not the actual size of the emmiter. Please help.
A ‘World particle collider’ only allows the emitted particles to interact with the existing world geometry- it doesn’t allow for other things to bounce off the particles. By the same token, it only bounces from the centre of each particle, since the particles don’t actually have size, as such (they are simply points in space that are rendered with a sprite).
Of course, if that wasn’t what you were asking, and you wanted to know how to make a particle emitter emit from more than just a small circle, try making the numbers inside of the Ellipsoid drop-down near the bottom of the settings window in the inspector. This defines an area in which particles will spawn.