Comparisons of star-forming indicators and linear size (LS) for our CSS sources. Panel (a) shows the SDSS sSFR measurements for our CSS sources with a black dashed line indicating sSFR = 0.01 Gyr⁻¹. Panel (b) shows the equivalent width of Hα (EW_Hα ) for our CSS sources where this line is detected at S/N > 3, while panel (c) shows the strength of the 4000 Å break. In Panel (d) the WISE colors are shown for galaxies where the AGN does not dominate the IR color (W1 − W2 < 0.5). Here the dotted–dashed lines separate colors associated with passive galaxies, star-forming galaxies, and (U)LIRGs. In all panels orange triangles denote CSS sources where the LS is an upper limit, and the black cross shows the median uncertainty for the data points.