Hubble type as a function of (a) the size of the bulge as measured by its effective (half-light) radius R_e, (b) the bulge-to-total light ratio (B/T) and (c) the average ellipticity of the galaxy within R_e calculated excluding the most-PSF affected data points inside . The mean trends together with the standard deviation within each bin 1σ are shown. Going across the Hubble sequence from the irregular types to elliptical galaxies, the bulge becomes larger, dominant, and round.