Planetary radius shown as a function of mass (left panel) and density (right panel) for all planets with measured error bars smaller than 30%. Gray dots stand for F-, G-, and K-type primary stars, and blue dots represent planets orbiting M-type stars. The two transiting planets of TOI-1238, with radius and mass uncertainties of ~5% and ~25%, respectively,are shown with red stars. The various planetary composition models of Zeng et al. (2016) are shown with solid colored lines.