Mass-radius diagram for single HeS models (showing the stellar radius, lines) and binary-stripped HeS models (showing the Roche lobe radius, symbols) as a function of the mass at core He-depletion M_He−dep. For single HeS models, the radius at a time t before the end of the run ($R_{\max }^t$) is plotted for different values of t (see legend). Binary-stripped HeS models are shown for different initial primary masses M_{1, i} (see colorbar), and different markers are used for Case A (circles) and Case B systems (squares). The binary-stripped HeS models are distinguished between those from the binary grid from Jin et al. (in prep., empty markers), and this work (filled markers with black outline).