Comparison of our results (shown in blue in each panel) with (1) the widely-used prescriptions by Hurley et al. (2000; shown in grey in the panels on the top row) and (2) the PARSEC models (Bressan et al. 2012) used in the SEVN code Spera et al. (2019; shown in grey in the panels on the bottom row). Panels on the left: comparison at solar metallicity (or its closest available equivalent, i.e. Z = 0.02 for SEVN) and panels on the right: comparison for low metallicity (Z = 0.0002 for SEVN). We show the maximum radius (circles) and the minimum radius (triangles). For our models, we also mark the radius at core carbon ignition (squares).