This is a brand new box protector for E.T. Phone Home for Atari 400/800/1200XL. The system had a lot of games released for it in a wide variety of sizes. These may be compatible with other games however I recommend measuring your box and choosing the closest size I carry.
These measure 191x27x232mm. The game is not included and is pictured for illustrative purposes only. These are not made by Atari and the Atari 400/800/1200XL name is used under the Fair Use Doctrine to allow adequate description of the function of the product.