Gaussian radii vs event multiplicity, for $\sqrt{s} = 0.9 $TeV and $7 $TeV. Panel a) shows $R^G_{out}$, b) shows $R^G_{side}$, c) shows$R^G_{long}$ and d) shows $R^G_{out}/R^G_{side}$ ratio. Lines show linear fits to combined $\sqrt{s}=0.9 $TeV and $\sqrt{s}=7 $TeV points in each $k_{\rm T}$ range