Observed distributions of angular length ϕ, showing that our three LoTSS DR2 search methods target different ranges of ϕ. The largest angular lengths detected by Oei et al. (2023a), RGZ, and the ML pipeline are 132′, 43′, and 8′ respectively, but we limit the horizontal axis to 12′ for interpretability. The vertical line marks the minimum angular length that giants can attain: ϕ_GRG(l_p, GRG = 0.7 Mpc) = 1.3′.