Cumulative total mass versus radius across four stellar mass ranges. Each simulation suite is coloured according to the colour code of the simulation suite. For each simulation suite, we select z = 0 galaxies at 10¹⁰, 10⁹, 10⁸ and 10⁷ M_⊙ (from top left to bottom right), within a bin of ±0.5dex. The median cumulative total mass profile is shown with a solid thick line in orange, blue, green and pink for the AURIGA, HESTIA, NIHAO and FIRE-2 galaxies, respectively. The vertical grey region covers all the R₁ values found for each stellar mass range.