Scaling relations between the cluster gravitational radii, R_g, and cluster radii, R_cl (dark red); the radii of the regions of influence, R_inf (blue); and the radii of the turnaround regions, R_ta (orange). Parameters of the linear scaling relations are given in the figure. Dashed lines show 1σ errors of linear fit, and error bars show radii errors. Numbers are order numbers of a cluster from Table 2.