Left: effective length map for the main cluster of region 211 of the snapshot 101, at z = 0.817. The two rings correspond to R₅₀₀ and R₂₀₀. Right: 1D profiles of the effective length for all clusters in our sample. We give in addition the median l_eff profiles computed for the full sample (green), the most relaxed (blue) and the most disturbed (red) clusters of the sample. The vertical dashed lines correspond to the 1.0R₅₀₀ and 1.4R₅₀₀ ∼ R₂₀₀, while the shaded areas correspond to the 1σ dispersion regions.