Evolution of the component radii. Upper panel: based on models without overshooting, α_OV = 0; lower panel: α_OV = 0.2. The light gray bands describe the time evolution of the radii for stars in the mass range M_1,2 ± ΔM_1,2, from Table 3. The darker areas fill the intersection with the R_1,2 ± ΔR_1,2 lines from the same table. The vertical lines bound the time interval respecting the constraint of coevality.