I divided the plant recently and sold the larger pieces, so this is blooming on one mature growth with two new leads. The leaves on this mature growth are shorter than normal about 12 inches. The leaves, on a mature division, would be 14 to 16 inches long.
I'm guessing because I don't have a mature specimen anymore after dividing it, but, I would think that it is in that range, a fairly big plant when allowed to grow multiple growths.