Distribution of the total mass of 5σ_δ peak and the ratio of mass of 5σ_δ to their corresponding 2.5σ_δ envelopes (cross points). We divided the X-axis into bins of unit width. For each bin, the median value of mass-ratio is shown by filled purple circle. The error bars correspond to the NMAD of the points in the given bin. The plot shows that most of massive M₅σ_δ > 12.8 reside much in protoclusters that have mass almost an order of magnitude higher compared to the M₅σ_δ peaks.