Relation between the beam-deconvolved sizes (in log scale) of hot core candidates for different species, with the x and y axes values representing the core sizes of CH₃OH and the other six species, respectively. The dashed red line represents y = x. The dashed black line shows the linear fit of all data points, except those of CH₃CHO. The dashed pink line shows the linear fit of the CH₃CHO data. The shaded regions indicate the standard deviation range of the data.