Median recovered bubble size versus real bubble size for LOS bubbles assuming a number density of 0.004 galaxies/cMpc³ (corresponding to a complete spectroscopic sampling of galaxies down to M_{UV, limit}=−17.2 at z≈8) for 5σ Lyα equivalent width limits = [10, 30, 50, 100] Å for the faintest galaxies (colored lines). The shaded region shows the 68% range of recovered bubble sizes for the Lyα equivalent width limit = 10 Å line. When the Lyα equivalent width limit is deeper than 50 Å we can estimate 𝒯 relatively well for each galaxy and thus we can recover bubble sizes ∼10−80 cMpc to within 30% of their true values (1−1 and 1−1±0.3 relations marked by solid gray lines). The dip at R_real∼100 cMpc is due to sightlines that pass through a big bubble but without enough galaxies to sample the space, causing us to recover a few smaller bubbles instead of one big bubble. This could be improved in future work when 𝒯 can be more precisely estimated, for example, with a prior from the Lyα escape fraction (see Section 2.3).