Profiles of magnetic (green lines) and plasma (red lines) energy densities across (i.e. along the y coordinate) relaxed monster plasmoids. Panels from the left compare: (1) different sizes, L/ρ₀, of simulation domain (2D with σ₀ = 10, B_z = 0); (2) different magnetisations, σ₀ (2D with L/ρ₀ = 1800, B_z = 0); (3) 3D and 2D domains (with L/ρ₀ = 900, σ₀ = 10, B_z = 0); (4) different guide field strengths, B_g/B₀ (2D with σ₀ = 10, L/ρ₀ = 1800).