R₁ as a function of galaxy stellar mass, measured within 20% of R₂₀₀, for all galaxies in the three simulations of our sample. Each of them is characterised as rotational (shown in blue) or dispersion (shown in pink) supported, following the criteria of Sales et al. (2010) and Correa et al. (2017). The median size value has been measured across 20 stellar mass bins in each case. We also show as shaded regions the 1σ error for both classifications. The top panel represents the percentage of galaxies in each morphology per bin, following the same colour code as the main panel. The global FWHM of the relation was found by fitting a Gaussian distribution, and it is indicated in the legend as σ, whose errors were computed via bootstrapping.