The rest-frame optical R_{e, bulge}-to-total stellar-mass trends for the two-component galaxies. The gray (and black) hexagons show the R_{e, bulge} (and median values), of galaxies identified with two-component structures in this work. The blue and red points represent the sizes of bulges in CANDELS galaxies and their corresponding median values for SF and quiescent (Q) galaxies at 0 < z < 3, respectively. The upper and right panels show the distributions of stellar mass and R_{e, bulge}, respectively. The gray histograms correspond to the galaxies from this work, while the blue-dashed and red-dotted histograms represent the CANDELS SF and quiescent populations. The error bars on median values denote the 16th and 84th percentiles of the distribution within each stellar-mass bin.