I'm still at The Twelve Apostles overlook, but I've walked to the most easterly area and am now looking southeast. The Gibson Steps are just off the picture to the far left.
These stacks are deceptively tall, as are the cliffs, and the next shot, while not a great picture, should give you some perspective. It might also help you reconcile that the taller stacks in the previous picture are in the 50-meter-tall range (and these are much larger).