Radius vs. incident flux (in units of flux received on Earth) for small planets (1 – 4 R_⊕) orbiting stars 0.7–1.4 M_⊙ and radius estimates with a precision better than 5%. All data were taken from the NASA Exoplanet Archive. Points in colour correspond to planets with density (and thus mass) estimates, where lighter and darker colours correspond to lower and higher densities, respectively. Grey points are planets whose masses have not been measured, and thus their densities are unknown. A fit to the radius valley following the relation in Petigura et al. (2022) is plotted in semi-transparent teal. TOI-733 b, marked with a black star, lies well within the sparsely populated region of the radius gap.