a) Distributions of the angular deconvolved sizes of all galactic sources with distance flags [1] or [2]. The black histogram is for all galactic sources (All), green for starless sources (SL), and orange for protostellar sources (PS, flags [1] and [2]). b) Distribution of the elongation of galactic sources. c) Distributions of the linear deconvolved sizes of galactic sources. The dashed histogram is for protostellar sources with a classification flag of [2]. d) Same as frame c) after selecting sources with angular sizes larger than 60′′  for both major and minor axes. The vertical dashed lines show the size of 0.2 pc.