It's probably a little over 3 feet long, with the interior height of the wire part being about 16 inches. The width might be 18," but I'm less sure about that. Total height from garage floor to top of cage is probably a bit over 3 feet.
(I am assuming the wire mesh on the side has 1" by 2" holes, because that is a very common size of wire for making rabbit cages and similar things. So I counted holes in the nearest side, and guessed the rest of the scale from there.)
(I am assuming the wire mesh on the side has 1" by 2" holes, because that is a very common size of wire for making rabbit cages and similar things. So I counted holes in the nearest side, and guessed the rest of the scale from there.)