Completeness C of a sample of giant radio galaxies up to cosmological redshift z_max as a function of projected proper length l_p. From samples of the posterior distribution, we infer the LoTSS DR2 GRG search campaign completeness up to z_max = 0.5. We show completeness curves for five randomly selected samples (grey) and for the posterior mean (dark green). We also show an interval around the completeness mean with the completeness standard deviation (SD) as the half-width (light green). The completeness peaks around l_p = 2 Mpc.