  We put forward a method for determination of the kaon radius from the spectra
of kaonic atoms. We analyze the few lowest transitions and their sensitivity to
the size of the kaon for ions in the nuclear charge range Z = 1 - 100, taking
into account finite-nuclear-size, finite-kaon-size, recoil and leading-order
quantum-electrodynamic effects. Additionally, the opportunities of extracting
the kaon mass and nuclear radii are demonstrated by examining the sensitivity
of the transition energies in kaonic atoms.
