R₁ as a function of the stellar mass of galaxies, measured within 20% of R₂₀₀, for different simulation suites, as is indicated in the legend. We show the median value of R₁ measured within 20 stellar mass bins, equally spaced. Orange, blue, and green relations correspond to the AURIGA, HESTIA, and NIHAO samples. In addition, we also show in pink single FIRE-2 low-mass galaxies and the relation found by Dalla Vecchia & Trujillo in prep., using public data from EAGLE simulations in red. To compare with Trujillo et al. (2020), we add in grey their observational results as well as dashed lines, corresponding to locations in the place with a constant projected stellar mass density of (from top to bottom) 0.1, 1, 10, and 100 M_⊙/pc².