calculate size of faces to have similar volume of platonic solids

Question

I need to build some prototype physical shapes of the 5 platonic solids.

But the problem is that I want to make them all about the same size,

so how to calculate how big should the faces of my solids have to be in order to have all 5 shapes with an approximate similar volume

Answer 1

The linked site expresses the areas and volumes in terms of edge-length. Should work for you...