Empty Mega Gengar Elite Trainer Box (Purple) for Pokemon Trading Card Storage - Cardboard Empty, shrink-wrapped Mega Gengar "Elite Trainer" box for card storage. (No cards included.) Box size is 7 inches (long) by 3 and 1/2 inches (wide) by 3 inches (deep). Box can hold approximately 400-500 trading cards. This box is constructed from a sturdy cardboard material that is suitable for everyday use.