As Fig. 5, but showing sizes for cluster galaxies as measured (not corrected for estimated size bias with respect to control field sample, see text for details). Empty symbols also show the measurement for the full relevant candidate cluster member samples, not accounting for residual background contamination (solid symbols account instead for residual background contamination as in Fig. 5). The three vertical lines on the left of the control field measurements show the field sample split by redshift (1.3 < z < 1.5, 1.4 < z < 1.6, 1.6 < z < 1.8), showing no redshift dependence in the field measurements across the redshift range of interest.