Question about the particle size

Each time i use ParticleStystem, the property ‘size’ is a bit confusing for me. What’s the mean about size? It seems not important, the property scaling can do the same things. right? What’s the unit of ‘size’? merter ? pixel?

The size is the base size of a particle in scene units on which a gradient can be used. Then you can use scale to refine vertically or horizontally the size.

basically the final one is size * scale.

Hey just checking in, was your question answered? @DWork