Correlation between R₁ and R₂₀₀ for central galaxies. Median (dots and solid lines) and 16% and 84% quantiles (shaded areas) are shown. We quote in the legend the average of the scatter for the entire sample of central galaxies and with respect to the analytic fit as well as the dispersion around the mean. The purple line and shaded area are the relation between R₅₀ and R₂₀₀ and its 16% and 84% quantiles. The dotted line is the linear correlation proposed by Kravtsov (2013) for early-type galaxies, R₅₀ = 0.015 R₂₀₀, with a scatter of 0.2 dex (shaded area). The top x-axis gives the corresponding halo mass, M₂₀₀.