Comparison of H I and stellar masses between our and the ALFALFA sample. Left: M_H I − M_⋆ relation. Our sample is shown as purple circles, the total ALFALFA-SDSS sample is given by gray points and contours, and the volume limited subsample with 2000 < V_sys[km s⁻¹] < 5750 is given by orange points and contours. Right: Median values of M_⋆ for M_H I bins between 8.8 < log (M_H I/M_⊙) < 9.5. Our sample is represented by purple circles, while the volume limited subsample from ALFALFA-SDSS is represented by orange squares.