The alocasia in our area are big enough to call attention to themselves. Flanking doorways, they almost appear to look like a palm tree with their sometimes 12 foot stalks and their big, big fans of leaves. Mine are in a pot, however. I don't have a spot where it would look "right" at that height.
plus get all the water they need. But I'm thinking on it. In the large pot they are about 3-4 feet tall. Mine like shade. They are in a heavy clay pot and I was unable to move them and protected them this winter. But due to the mild winter we had, they did just fine in their suspended animation.