Disc fluxes at λ = 1.3 mm as a function of flux radius, similar to Fig. 4, in a disc created from a 1 M_⊙ cloud core, comparing different combinations of high and low angular momentum, and strong or weak viscous heating. High angular momentum results in larger discs, at both the 68 and 95% limit, with a higher flux, while lower viscous heating reduces the flux and increases the 68% flux radius, but has a negligible effect on the 95% flux radius. The combination of weak viscous heating and high angular momentum clearly provide the best agreement with the 95% radii of the class 0/I discs.