Distribution of the ratio between nuclear disc size, defined kinematically as the radius with maximum v/σ, and the effective radius of the photometric bulge component fitted through careful 2D multicomponent photometric decompositions. The values are clustered around a single value, following a normal distribution (r_k/r_e = 0.86 ± 0.19), which shows that the photometric component defined as the bulge is (or is dominated by) the rapidly rotating nuclear disc.