Mass contained in the envelope of inflated models as a function of their effective temperatures for the five metallicities considered in this study. Only models with Y_s < 0.3 are shown. The black dotted line has been drawn to guide the eye (see text). The bottom panel only shows models with M_env > 10^-2M_⊙ and T_eff < 30 000 K. The colour bar on the right represents the fraction of the stellar mass contained in the inflated envelope.