Top: relationship between the isotropic maser luminosity as obtained from the EVN data and its spatial extent (the major axis) and bottom: relationship between the velocity extent of the methanol maser line and the spatial extent. The targets from this paper are marked with black circles; the targets from Bartkiewicz et al. (2009) are marked with open circles and triangles (the sources with clear ring-like morphology containing more than four maser spot groups).