Dust effective radius vs. continuum flux density at 0.88 mm for circumstellar disks in Taurus and Ophiuchus (gray points, Tripathi et al. 2017) and Upper Sco (black points, this work). Flux densities have been scaled to a distance of 140 pc. The dashed line shows the disk size–luminosity relation from Tripathi et al. (2017), which has been extrapolated to the flux densities of the Upper Sco disks. The Upper Sco sources shown are those with a continuum signal-to-noise of at least 15.