Half-mass radius compared with initial fractal scale length for each Plummer radius. The colored figures represent the R_Pl = 50, 100, 250, and 500 pc. The colored dotted lines set the fit for each R_Pl. The dotted horizontal yellow line is the 3D half-light radius of UMa II (Wolf et al. 2010). The vertical gray rectangle represents the range of r_frac in which the UMa 3D r_1/2 can be reached. Data obtained from Table 2.