Left: ionized gas size traced by the Hα emission, R_Hα, as a function of the stellar continuum size in the K band, R_star. The 1:1 relation is shown using the dashed black line while the best fit is shown in magenta using a solid line; this latter was derived using a linear least square fit. The mean (standard deviation) and median (M) values are shown. Double circles represent galaxies containing an AGN. The dashed blue area represents the size covered by the CO emission for a direct comparison. Middle, right: molecular size versus stellar (middle) and ionized gas (right) distributions. The double circle identifies galaxies with an AGN. The dashed black line represents the 1:1 ratio. The solid lines and the shaded areas represent the median values (MAD). The mode values of these ratios are similar to the median values when considering the stellar results, while we derive a mode of ∼1.3 when considering the Hα results.