One-dimensional charged kaon radii versus $m_{\rm T}$extracted by fitting correlation functions shown in Fig.[2] to Eq.[1] and the baseline to Eq.[2]. For comparison the $\pi\pi$ and ${\rm K}^0_{\rm s}{\rm K}^0_{\rm s}$ radii measured by ALICE in 7 TeV pp collisions are also shown Statistical (darker lines) and total errors are shown. The points corresponding to the second and third multiplicity bins are offset by 0.03 GeV/$c$$^2$ for clarity.