Radii $R$ (left) and $\lambda$ (right) as a function of the cubed root of the average charged-particle multiplicity density for different \kt ranges. Filled markers represent the results obtained for \PbPb at \fivenn, hollow markers refer to results obtained in \PbPb at \twosevensixnn~. Vertical bars and boxes represent the statistical and systematic uncertainties, respectively. In the right plot, the star marker represents the estimated genuine $\lambda$ value calculated from resonance decay contributions. See text for details.