Mass–radius diagram for all known transiting planets with dynamical masses determined with a precision better than 30% from the TEPCat data base of well-characterized planets (Southworth 2011). Planets orbiting M dwarfs (T_eff < 4000 K) are shown in orange, others gray. The planets orbiting HD 260655 are shown with stars. The left panel shows theoretical models for the internal composition from Zeng et al. (2019), while the right panel shows a zoom-in version of the left panel with theoretical models from Turbet et al. (2020).