I'm building a Mayan ruins-themed tank (all my reptiles are on display), and making some pyramid hides. Just wondering how large they should be? I made one that's about 9" x 11" at the base, which seems like it will be appropriate for at least a juvenile, but I'm not sure. I'm getting hooked up from a breeder friend of mine, so I'm not 100% sure what age snake I'll be getting.