SHAREBOX Medi Get your own Sharebox with 12 lockers to your free disposal. A Medium Size Sharebox has 15 lockers in total. By ordering you get 12 lockers to your free disposal. For each cabinet, three lockers are reserved for regular Sharebox customers. (unless otherwise agreed). By getting your own Sharebox you can easily hand over keys and other small items with, friends, family, colleagues, associates, members, and nabours. Safe, efficient and convenient.