Distribution of 3D half stellar mass radius (log R_hsm), SDSS (g − r) colour, stellar age in r band (log age_r), and Sérsic index (n_Sérsic) versus stellar mass (log M_*) for selected spheroidal galaxies (blue points), their massive sub-sample (${\mathrm{M}}_{\ast }>{10}^{11}{\mathrm{M}}_{\odot }$; orange points), and the full sample of galaxies (with ${\mathrm{M}}_{\ast }>2\times {10}^9{\mathrm{M}}_{\odot }$; black contours) from the HR5 simulations at z = 0.625, respectively. The dashed black line in the bottom right-hand panel indicates n_Sérsic = 1.5.