Mass–radius relationship for the CHIMPS clumps (coloured points) and, for comparison, we overlay contours containing 90% of the points in ATLASGAL (Urquhart et al. 2018) in red, and GRS (Roman-Duval et al. 2010) in blue. The coloured points are the distance-limited CHIMPS sample, while the grey points show the full sample. The dashed, dotted, and dot-dashed lines show the best-fit power-law to the various samples. The derived power-law fits are and Spearman’s rank correlation coefficients are listed in Table 3.