Jumbo size Reptile hide boxes- 20"x13.5"x6" tall. Unlike competing products, these have the door offset so your snake can really feel secure rather than much of the front being exposed. These are designed to fit in most major brand cages 2'x4' and up. We like this size for larger sized boas and pythons. Remember-You want to select a hide that will be a snug fit for your reptile. If it is too big it will not offer the security they need!