im not really sure, i cant say until this weekend :) but i'd guess the plants diameter is 10 inches. the plant got repottet for the first time in 20 years, it was standing in a very small plastic pot and the part that looks like a stem is old roots, they literally filled out the whole pot there was only dirt in the top of the pot.
But it is interesting and different and looks like a very old plant, check out the little white spot at the node of two stems. Make sure that isn't a mealy there. Norma