Measures: About 14cm long. Hidden room measures: About 8cm x 2.5cm diameter.. The default password is iloveU. You can also set your own password. The password between you and your friends is not open when he is wrong. So it´s interesting. You can contact us to set your password.. Beautiful packaging, you can see the picture, I believe you will like it! When you open the lock, you can see two rings, and I´m sure you´ll be surprised at what you care about. Of course, you can also buy, in which more precious rings or necklaces, and so on. When you set up a new password, just turn the screw and re edit the alphabet 6 password ring.. The Da Vince code Mini Cryptex, Christmas and Halloween are the most interesting gifts for friends, children and parents. Of course, Valentine´s Day gives the best gift to others. If you have any questions, please contact us!. Beautiful packaging, you can understand through the picture, I believe you will like it! When you open the lock, you can see two rings, and I´m sure you´ll be surprised..