[AmityvilleHams]

You'd get the space from the unit minus the bottom piece,which may make it a significant amount of space smaller than expected.Of course,with any of these they'd be at least a few square inches less than the dimensions in terms of floor space,but the Avdala would have more space compromised by the design.It may have more floor space though,but figuring out the internal dimensions is very important to account for any edges and such that would make a cage have less floor space!