Distribution of morphological types (top left), absolute B-band magnitudes (top middle), and disc effective radii (top right) of the spiral galaxies in the CALIFA mother sample (unfilled black histograms) and the galaxies selected in this work (filled blue histograms). The middle and bottom panels show the normalised distributions separated according to the presence or absence of bars: barred galaxies (red histograms), unbarred galaxies (green histograms) and not clearly identified galaxies (blue histograms). The dashed grey line and the red arrow mark the location of the MW in each panel. The values for the absolute B-band magnitude (M_B = −20.8 mag) and the disc effective radius (r_e = 3.6 kpc) are taken from Karachentsev et al. (2004) and Bovy & Rix (2013, considering r_e ~ 1.67r_d respectively.