Abstract. Isotonic and isobaric dependencies of nuclear charge radii in the region between Z = 54 and Z = 70 are obtained from the analysis of isotope shift data fi (r 2) and muonic and electron scattering data on (r2). They are compared with the predictions of the droplet model and the Hartree-Fock calculations. The isobaric dependencies of (r 2) have proven to be especially sensitive to the choice of an effective nucleon-nucleon interaction.PACS: 21.10.Ft, Ky; 31.10.Gs radii. For evaluating such dependencies one needs, besides the isotopic changes of (r 2) deduced from optical isotopic shifts, also the absolute value of(r 2) for at least one isotope in each isotopic chain. The latter can be taken from muonic spectroscopy or from electron scattering measurements on stable nuclei. In Table 1 the values with the smallest uncertainties being exploited when the data on (r 2) were available for several stable isotopes of an element involved (for example, 138Ba, 144Nd,