Variance of the value of r_e for a set of 15 000 galaxies as a function of input magnitude (left) and effective radii (right). Only galaxies where GALFIT convergence was attained are included in this figure. The large dark blue points represent the median sizes per bin, the error bar in the y-axis is . The shaded region delimits the 16th and 84th percentiles and includes 68% of the sample of each bin.