Polar-ring galaxies (PRGs) are multispin systems, showing star formation in a blue latetype component, perpendicular to a red early-type one, revealing how galaxy formation can sometimes occur in successive steps. We perform two-dimensional decomposition in the g, r, i bandpasses of 50 PRGs from the Sloan Digital Sky Survey. Each object was fit with a S´ersic host galaxy and a S´ersic ring. Our general results are: (i) the central (host) galaxies of the PRGs are non-dwarf sub-L∗ galaxies with colours typical for early-type galaxies. (ii) Polar structures in our sample are, on average, fainter and bluer than their host galaxies. (iii) In most galaxies, the stellarmassM∗ of the polar component is not negligible in comparison with that of the host. (iv) The distributions of the host galaxies on the size – luminosity and Kormendy diagrams are shifted by ∼1 mag to fainter magnitudes in comparison with E/S0 galaxies. It means that the PRGs hosts are more similar to quenched discs than to ordinary early-type galaxie