Continuum source half-light radii from this work versus the Shakura-Sunyaev disk radii expected at the observed continuum wavelengths. The latter radii were computed using Eq. (3) of Mosquera & Kochanek (2011) with an accretion efficiency of η = 0.1, and black-hole masses from Sluse et al. (2012), Shalyapin et al. (2021), and Hutsemékers et al. (2023). C IV, Mg II, and Hα are illustrated in blue, green, and red, respectively. The continuous line indicates where log₁₀(r_1/2 Cont) = log₁₀(r_disk).