Notes. All three simulations have been performed assuming a matter-dominated Universe Ω_M = 1 and starting expansion factor a_ini = 0.0005. The second column gives the relative amplitude of the sine waves along the x and y axes: ϵ_2D=ϵ_y/ϵ_x. n_g denotes the spatial resolution of the grid over which the Poisson equation is solved and n_s denotes the spatial resolution of the grid used for tessellation. a_i is the expansion factor of the first output snapshot, whose mass profile M_i we measure and scale our self-similar solutions accordingly. a_{SC, x}, a_{SC, y} are the estimated expansion factors at first shell-crossings along the x and y axes, respectively. a_ℳ, a_r are the expansion factors of the earliest snapshots for which self-similar fits to the mass profile and the particle trajectories could converge.