Top panel: comparison of the granule size approximated with the pressure scale height d_NSR (see Eq. (18)) against the mean granule diameter d_gran (same as Fig. 11) for all models. The individual stellar parameters are indicated (T_eff, log g and [Fe/H] with red, gray, and blue respectively). We indicated the position of d_NSR = d_gran the solid diagonal line. Bottom panel: relative residuals. We indicated also the mean residual (dotted line), which amounts to ~ 30%. Here, models with the same gravity are connected (solid grey lines).