16 small plant pots (Old Ottawa South)

I have 4 that are 4 x 4 inches, 5 that are 3 1/4 x 3 1/4 inches, 1 that is 3 inch diameter, 1 that is 2 1/2 inch diameter, they are plastic, used and empty. In addition to these, I have 5 more that are clay, 1 is 3 1/4 inch diameter, 2 are 3 inch diameter and 2 are decorative 2 1/2 inch diameter. They do not need to go together.