K$^{\pm}$K$^{\pm}$ 3D radii and $\lambda$ parameters as a function of the pair transverse mass $m_\mathrm{T}$ fitted with a power-law function $R_\mathrm{out, side, long}(m_\mathrm{T}) = a \cdot m_\mathrm{T}^b$. Points for the 5--10\%, 20--30\%, and 50--70\% centrality classes are slightly shifted in the $x$ direction for clarity. Statistical uncertainties of the experimental points are shown with bars, and systematic uncertainties are depicted with boxes. The width of the bands represents the uncertainties of the power-law fit.