Dependence on the solar distance, D in AU, of a) the radial size in the direction (AU), b) the mean magnetic field strength (nT), and c) the mean proton density (cm^-3) with log-log plots. The MCs are separated in three groups: non-perturbed (filled green circles), perturbed (empty blue squares), and in interaction (red stars). The straight lines are the result of a least squares fit for non-perturbed (thin continuous green line), perturbed (dashed blue line), and for non-perturbed and perturbed MCs (thick continuous black line). The fits and the absolute value of the correlation coefficients, r, are added at the top of each panel.