Comparison of the dynamical (open circles) and spectroscopic (filled circles) mass measurements for luminosity class I objects (supergiants) with the evolutionary masses. The shaded region between the solid lines shows the full range (m_start to m_end) of evolutionary masses for the rotating solar metallicity models. The dashed lines mark the upper and lower mass ranges for the non-rotating solar metallicity models, while the dotted lines bracket the possible masses for the rotating LMC metallicity models and the dashed-dotted lines enclose the SMC metallicity models. Double encircled objects are located in the LMC.