Surface brightness profiles for Malin 1 assuming three possible geometries (see legend in top-left panel): an axis ratio of 0.8 and a PA of 40 deg, an axis ratio of 0.97 and a PA of 5 deg, or an axis ratio of 0.8 and a variable PA as suggested in Lelli et al. (2010). Profiles have been de-projected to their face-on value. They are compared to the best fit model of Sect. 5.1 including or not dust attenuation. The shaded area presents the regions excluded from the fit (avoiding the bulge and bumps likely related to the spiral structure) but the model is in agreement with the data also in the remaining of the disk (within a few sigma).