Mass-insolation-radius diagram for TOI-1135 b, together with all known exoplanets (grey dots) with a precision better than 8% in radius (through transit) and 20% in mass (from RV) from the Extrasolar Planets Encyclopaedia. The population of young transiting exoplanets (≤900 Myr) with measured masses is plotted as coloured dots, according to their ages. The uncertainties on TOI-1135 b are shown as coloured shaded regions with 1, 2, and 3σ levels of confidence. In the left panel, the iso-density lines are displayed as dashed grey lines. Saturn, Jupiter, and Neptune are also depicted for reference.