Two-dimensional synthetic stellar bars constructed from co-added NUV (top) and FUV (bottom) images of disk galaxies that were oriented and scaled with respect to the bars, flipped to make the spiral arms wind clockwise (if needed), and grouped based on revised Hubble stage (T, increasing from left to right). The number of galaxies in each subsample is also indicated. Bar stacks are shown in units of mag arcsec⁻² (see vertical bar for thresholds and color-coding) and cropped to a radius 1.5 ⋅ r_bar, so that all binned galaxies are covered radially. The dotted lines show isophotal contours with a step of 0.35 mag arcsec⁻². The ellipse represents the average ellipticity (3.6 μm) of the galaxies in the bin (from Herrera-Endoqui et al. 2015; Díaz-García et al. 2016a). The mean bar length is used as a unit, but the actual mean 3.6 μm bar lengths in kpc vary for each T-bin (see Fig. 11 and Table 3 in Díaz-García et al. 2016a) and are lowest among the faintest galaxies.