Book Secret Hidden Security Safe Lock Cash Money Jewellery Locker Box M Size 2 Models (Security Code or Key) for Choice (Open by Key, Encyclopedia of the Stars) SIZE: Outside 18*11.5*5.5cm (7.1*4.5*2.2in); Inside 17*10*5cm(6.7*3.9*1.9in) MATERIAL: Paper book cover, plastic pages around the outside, steel plate inside. Strong and sturdy. SAFE: This steel safe box can be locked by key or security code. An instruction about how to set up is also included. STORAGE: Big and deep enough to store Jewelry, treasure cards, birth certificate, a few money orders and cash. The lettering and picture are clear and delicate, make it look authentic in a drawer or standing on a shelf with other books, blend seamlessly with real book. A great gift for your children, families and friends.