Effective radius-stellar mass relation for elliptical galaxies. Filled symbols are field (squares) and cluster (circles) ellipticals of our sample. Empty symbols are as Fig. 6. The thick solid lines are the best fitting relations obtained with the least square fit for values lower and higher than ℳ_∗ = 2.5 × 10¹⁰M_⊙, , and respectively. The blue dashed line is the best fitting relations obtained in the two mass ranges using the orthogonal fit (see Appendix A), and respectively. The gray dot-dashed line is the relation R_e = 0.53(ℳ_∗/ 3 × 10¹⁰)^-0.2(0.5 + 0.5(ℳ_∗/ 3 × 10¹⁰)^0.8)^0.119 defining the Zone of Exclusion (ZOE) as obtained by Cappellari et al. (2013a) and scaled by a factor (see text). Open symbols represent the samples of Raichoor et al. (2012; stars, R12) and of Delaye et al. (2014; triangles, D14).Cyan crosses are elliptical galaxies selected from CANDELS.