Evolution of the size of CoRoT-11b (in Jupiter units, 1   R_Jup = 71492 km) as a function of the age of the system (in Ga = 10⁹ years). The coloured areas correspond to constraints derived from stellar evolutionary models matching the mean stellar density and effective temperature within a certain number of standard deviations: less than 1σ (red), 2σ (blue) or 3σ (green). The curves are evolutionary tracks for CoRoT-11b computed assuming a planetary mass of M = 2.33   M_Jup and equilibrium temperature T_eq = 1657 K), and using different models as labelled (see text for more details and the online edition of the Journal for a colour version of this figure).