How to create multiple spherical particles with different radius at once in EDEM

Hello,

It is easy to manually create 5 single sphere particles with different radius. However, it is difficult to manually create dozens, or even hundreds of single sphere particles with different radius.

Therefore, I was just wondering if there was a quick way to create dozens, or even hundreds of single sphere particles of different radius at once. Then, i can use these particles with different radius to create a meta-particle.

Kind regards,

Chao