Comparison of the physical parameters of the simulations (EAGLE, blue dots; TNG100, orange stars; TNG50, green triangles) with observations (brown filled circles). Left panel: Star formation rate as a function of stellar mass, the so-called main sequence of SFGs. Middle panel: Effective radii of galaxies as a function of stellar mass, the so-called mass-size relation. Right panel: Distribution of the maximum circular velocity of the simulated sample compared to V_out = V_c of the observations.