hey tom, my understanding for jungles (because they like climbing) is height as tall as snake is long, width is half length of snake and depth at least 1/3 of snake.......ur jungle should grow to about 1.8m......but if snake is yng a small cage will do.
depends on the type of jungle you have, from my understanding palmerstones grow to around 5 foot whereas athertons grow to over 8 foot,...feel free to correct me if im wrong anyone,...
make sure the heat source is covered with a mesh cage so it doesnt burn itself.
It basically comes down to opinion, but I believe the jungle would be fine in an enclosure that size. It is probably a good size for most forms of Jungle Carpet Python.