A model relating the volume of a compressed magnetic field generator pulsed power system to its electrical energy output is developed. This systems model includes energy density and/or power density models of the electronic components and a CMF generator model which has been confirmed experimentally for system output energies up to 5000 joules. For a given output energy there exists an optimum selection of the pulsed power components to give an overall minimum system volume. Under optimum conditions the volume of the CMF generator is equal to one-half of the overall system volume and the overall system volume increases with the one-half power of the systems output energy. In an all electronic system there is a linear relationship between system volume and output energy.