Strangely he was thinking about jumping off the arm of the sofa and gauging the height, but he is still quite nervous of jumping off things. The atlas he got stuck on top of and was too nervous to jump and needed help off the other day was much lower. Maybe just under two feet tall (propped against the side of the stairs). He was definitely too nervous to jump off the sofa cushions which isn't that high really which is why he is pacing about a bit! But once they do it, they don't worry about it. Pickle just used to walk down the front of the sofa upside down using his claws to get down, rather than jump. I think for all his activity, Raffy is slightly cautious about jumping off things, which is good.