Number density of voids larger than r, n_v(r)_c, obtained for voids found in the distribution of SDSS (black points) and Uchuu-SDSS galaxies (pink solid line) with M_r < −20.5 and 0.02 < z < 0.132 and predicted by the theoretical framework described in Section 4 with Planck 2015 parameters (black dashed line). Shaded pink region delimits the standard deviation (1σ) of the 32 Uchuu-SDSS lightcones.