The radial profile of Σ_* as a function of R/R_e and the cumulative M_* as a function of physical radius R in different stellar-mass ranges. Blue, green, and red correspond to the mass ranges ≤10^9.5, 10^9.5–10¹⁰, and ≥10¹⁰ M_⊙, respectively. Within each mass range, the solid line represents the median profile of LSB galaxies, the dashed line for HSB galaxies, and the dotted line for large-size galaxies. Shaded areas denote the errors associated with each median profile. The number of LSB and HSB galaxies in each stellar-mass range is listed in the legend.