Comparison of the inferred bubble sizes (), if required to explain the observed velocity offset (Table 1), to predicted bubble sizes (; see Sect. 3.2) as a function of absolute UV magnitude M_UV of the LAE. Inferred sizes are shown both assuming the neutral hydrogen fraction outside the bubble is fixed (; top panel) or evolving with redshift (, in which case a bubble around many of the lower-redshift sources is not found to be necessary; bottom panel). Predicted bubble sizes that can be produced by the LAE alone are shown by squares, while those with an additional ionising photon contribution by other sources contained within the bubble, if any, are indicated by hexagons. Predictions assume a fiducial age of t_* = 50 Myr and f_esc, LyC = 5%; arrows in the bottom panel indicate how estimates shift under varying assumptions.