Lyα halo flux as a function of halo scale length. Our limiting Lyα halo flux and scale length are indicated by the red lines (dashed for the mosaic and solid for udf-10 sample) and grey hashed area, respectively (see Sect. 4.3.2). Upper limits on the scale lengths are indicated by arrows. W16 measurements are indicated by the black points. Spearman rank correlation coefficients ρ_s and corresponding p₀ values for our results and those of W16 (excluding upper limits) are shown in each panel.