Logarithmic magnetic-to-radiation pressure ratio plotted as a function of aperture diameter in physical units. Subsets of the sample are identified using different plotting symbols: SFRS nuclear regions (open diamonds); SFRS extranuclear regions (filled circles); GOALS nuclear regions (open triangles); and GOALS extranuclear regions (open squares). Running medians for all regions, as well as all nuclear and extranuclear regions, are shown by solid lines using large filled circles, triangles, and squares, respectively. The red dashed lines and open symbols indicate how the magnetic pressure estimates change by letting the path length of the synchrotron emitting medium scale with the physical diameter of the photometric apertures for extranuclear regions resolved on scales <1 kpc after subtracting a local background. The magnetic-to-radiation pressure ratios appear to be sensitive to the physical size of each region, showing a steady increase with increasing physical size of the aperture.