NIR hot dust sublimation radii (R_dust) vs. Fe Kα line region radii (R_Fe) shown in black. Circles represent R_dust from reverberation lags and squares are interferometric measurements. The unfilled violet symbols are the BLR radii (R_BLR) based upon optical reverberation mapping. Dotted lines connect these various measurements for any one source. The gray shaded zone represents R_Fe > R_dust (i.e., scales commensurate with the body of the torus and beyond).