Comparison of M 81-group mass estimates of this work using the Hubble flow, virial, and projected mass methods (blue circles, green squares, and orange diamonds, respectively), together with mass estimates from the literature. The vertical dashed grey line and shaded band indicate the weighted mean and 1σ uncertainty of the three estimates of this work. For comparison, literature values are shown: Hubble flow analyses by Del Popolo et al. (2021), Del Popolo & Chan (2022), Peirani & de Freitas Pacheco (2008), and Karachentsev et al. (2002), Karachentsev & Kashibadze (2006); virial and projected pass estimates from Karachentsev et al. (2002); and the most recent projected mass by Karachentsev & Kashibadze (2021).