Mine have a 5ft X 5ft X 2ft run, which is about 25sqft of space, but about 5sqft is taken by the litter tray and the house/box. If I take them both out, the space is huge, but they need both of these, so... . I have wanted to extend the run by about 2ft, which would have made it 7ft X 7ft X 2ft but my dad couldn't be bothered to build it, which would have made the area 49sqft!!!!!! I believe that my rabbits are fine with their 20sqft of space left and they snooze and eat most of the day anyway, so....