Left panel: Computed R_h for the galaxies of our sample as a function of their total stellar mass. The star symbols represent observational data of some relatively isolated dwarf galaxies taken from McConnachie (2012) that fit our mass range and the LMC and SMC. Right panel: Computed mean metallicities for each galaxy of our sample as a function of their stellar mass within R_h. Observational data of some galaxies taken from Urbaneja et al. (2023) and Sextl et al. (2023) are represented with pentagons (for red supergiants, RSG) and squares (for blue supergiants, BSG), and upside-down triangles, respectively. The solid line represents data taken from Gallazzi et al. (2005) for a sample of 44 254 galaxies taken from SDSS. In both panels, the simulated galaxies are colour-coded by their amount of total accreted stellar mass.