Distribution of apparent major isophotal diameter D₂₅ converted into kpc as a function of mean surface brightness in the g-band within the D₂₅ diameter for the 2278 EFIGI galaxies for which these parameters are defined and with Inclination-Elongation  ≤ 2 and Contamination  ≤ 1. Different symbols are used for different EM-types. This graph shows that galaxies with a surface brightness of dE but a more extended diameter could be detected in the EFIGI catalogue.