Comparison of the total and ENLR [O iii] line measurements for the centroid distance from the QSO (d_QSO), maximum size out to a fixed surface brightness limit (R_int), the median [O iii] line width within the central 1′′ (W₈₀), the ellipticity of the central [O iii] emitting region (e) and the outer power-law radial surface brightness slope (η). The 1:1 relations are shown as a dashed line in each panel. The colour of each data point corresponds to the contrast ratio C as indicated by the colour bar which is defined as the fraction of resolved to the total [O iii] emission.