Luminosity profiles of ESO 533-4 in the four bins perpendicular to the mid-plane that are indicated in Fig. 1 (large dots). The fits are indicated with the dotted lines, and the contribution of the thin and thick discs are indicated with dashed lines. The vertical solid line indicates the height, z_s, above which 90% of the light comes from the thick disc according to our fit. The dot-dashed grey vertical line indicates the maximum height, z_l, that we use for the fit. ρ_T0/ρ_t0 stands for the thick to thin disc mass density ratio at the mid-plane, σ_T/σ_t for their velocity dispersion ratio, z_T and z_t for the thick and thin disc vertical scale heights, Σ_T/ Σ_t for the thick to thin disc mass ratio, μ_i for the lowest fitted surface brightness level, and Δm for the range in magnitudes over which the fit was done.