Proper radius containing half of the stellar mass, R_{0.5 stellar}, as a function of the stellar mass, M_stellar, of simulated DMC stellar objects at redshift z = 0. Dark matter-containing stellar objects are separated in dark matter-rich (M_dm/M_baryonic ≥ 1; blue bins) and dark matter-poor (M_dm/M_baryonic <  1; purple crosses) types. The yellow star shows the position of NGC 1052-DF2 with M_stellar = 2 × 10⁸ M_⊙ and a 3D deprojected half-light radius of 2.7 kpc (van Dokkum et al. 2018a). The dashed vertical and horizontal lines indicate the initial baryonic matter mass of a particle (1.26 × 10⁶ M_⊙) and the smallest fiducial cell size (48 pc). Subhalos with a stellar half-mass radius below the cell resolution are not shown in the plots. The histograms are normalized such that the total area is equal to 1.0 and such that they have bin widths of log₁₀(ΔM_stellar/[M_⊙]) = 0.10 and log₁₀(ΔR_{0.5 stellar}/[pc]) = 0.10.