
I used a 16oz lead cannon ball mold that I got at a sporting goods store. The mold cost about $40 and a box of "plaster of paris" was another $10.

I just poured them about 1hr ago so they are extremely soft yet. The one is 16oz (1.68 in) and the other is 12 oz (1.54 in)

I am not sure what the smaller one will fit?