Very small, the door locks on top and doesn't fall by itself, resulting in my own carelessness causing me to lose the bird, as they say, the little bird flew away.

I have been using it for about 3 years....the base has broken into 4 parts, it has opened and unfortunately there is no integrated mesh underneath so that the bird does not escape....very dangerous... also in these dimensions I cannot find the appropriate base, resulting in having to render it useless even though it is new, it has no other damage