Its grown as quite an unkempt hedge. 7-8 feet high, at least 20 feet long and 4-6 feet deep. I'm certain its not elderberry, though it is rather similar so that's not a bad guess. I do believe it IS a privet hedge that's been allowed to grow rather wild! I've only ever seen them quite well pruned. Please bear with me, I'll get more photos as soon as I can.