How large? Give a little perspective? What the h! Are you high? Like the man said, it's "one bush. Not a stand of plants, not a small forest, not even a mighty California Redwood. A bush." But, since you feel the need for "perspective," the following is from: http://www.laspilitas.com/nature-of-california/plants/arctostaphylos-hookeri-franciscana-franciscana-manzanita.
Franciscan Manzanita is an evergreen ...two by six feet, ..." (ellipsis added).
There, does that help put things in "perspective"?