It would depend a lot on the animal too. Mine just hangs out in his ficus trees and walks over to the window to bask (it's open for him.) He also has a section where the water mists and he goes over there to drink. I imagine others might be more prone to roaming, so they might need a bigger cage than that. Bigger screen is better too so they dont rip out any nails and if they nose rub it's not as bad.