That size part thing is completely unnecessary In the shape section of the particles theres a row that says "Shape" Click on the box and select sphere How the shapes work: Box: particles in one direction but spawns everywhere in the part Cylinder: particles goes in 360° in one axis Ring: particles spawn in such a way that it forms a ring **you can see this with X and Z size the same** Sphere: particles spawn in the exact center of the part regardless of size