Sizes of the measured features in barred galaxies shown as a function of a) the parent galaxy mass and b) the Hubble stage T. The sizes are normalized to the length of the bar. Shown with different colours are the inner (green), outer (blue), and nuclear (red) features, as well as barlenses (black). Within these feature categories rings, ringlenses, and lenses are shown with different symbols. Stellar masses are from P3 (Munoz-Mateos et al. 2015). The fit for inner structures (solid green line) is statistically significant, while the one for barlenses (dashed black line) is not.