Extra Large size Reptile utility hide boxes- 16.25" x 11" x 4.5" tall. Door size - 4" wide x 3.25" tall Our new and improved hides are made of heavy 1/8" thick polypropylene and are nearly unbreakable. They now feature smooth inner and outer surfaces for ultra easy cleaning. Unlike competing products, these have the door offset so your snake can really feel secure rather than much of the front being exposed. We like this size for average size large adult Ball pythons, medium boas and Woma 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!