R₂₀/R_e, R₈₀/R_e, and C as the Sérsic index a function of n for the EGS images at 0 < z < 2. The dot-dashed black curve in each panel represents the numerical correlations derived by integrating the Sérsic profile. In the bottom row, the solid purple curve is the empirical relation of Eq. (5) given by Andrae et al. (2011). The colour of the points marks the relative sizes of the galaxies with R_e/FWHM.