4' long 2' tall about 12" or 14"wide . These are considered 55 US gallon but are really about 50 US gallons
based on his size you may want to consider throwing some larger diameter PVC in there as i'd worry they might get stuck
I find it won't move up even with larger available until they won't fit anymore. All the pipes are smooth so we should be fine. I will be adding wood as they get on but they are under visual inspection till all are fat,then more hidey holes will be given
I appreciate all points as that is how we get better and will watch that situation closely
