  We present numerical evidence for the hypothesis that, in the planar limit,
four dimensional Euclidean Yang-Mills theory on a finite symmetrical four-torus
breaks chiral symmetry spontaneously when the length of the sides l is larger
than a critical value l_c with a bilinear condensate whose value is independent
of l. Therefore spontaneous symmetry breaking occurs at finite volume and
infinite N_c reduction holds for the chiral condensate.
