I emailed the people and asked how big it is, but they haven't answered yet.
I decided to report it anyway, as someone pointed out before you can get a good idea of the size if you compare it to the house bricks. I told ebay that it was not fit for purpose, told them about the animal welfare act etc, and pointed out the dangers of the glass bottom.
I hope ebay remove it. Maybe if some of you could complain about it too they might take it more seriously? What do you think :?