I try to keep several cages on hand for those "just in case moments. Hubs keeps them in the shed or one of those portable grages. I gave one to a gentleman down the road who bought a "love bird" and someone gave him another "lovebird". He was given the cage with the other "lovebird", it was about 9 inches by 9 inches!
When I took the cage down to him I was shocked to see two KEETS sitting in this tiny cage. The birds were thrilled to have a large cage to fly in and play in & Mohamad is thrilled that someone GAVE him something without wanting anything in return. I still have 1 small bird cage and another I can add a bottom to and it will be a nice cage for a couple of birds Tiel size and down, it's just a matter of finding the right bottom for it.