Size you can use 2 hook rails with shelf, size: 21.5 x 4 x 7 cm, these key hooks do not require a lot of space on the wall, you can keep all the keys in one place and keep them well organized.Easy to install wall-mounted key bar very easy to install, because the hooks are self-adhesive, no drilling is necessary. Before installation, first we need to remove the residue on the wall, then stick it to the wall with sticky glue, it can be easily hung on the wall .Has many usesPerfect U-shaped design for storing and organizing letters, 4 key hooks hold your keys and other small items, wall organizer for kitchen, bathroom, bedroom, wardrobe, door, entrance, etc. Quality service as well as important letters are always tidy. easy to find if you have any questions about our products, we will do our best to ensure your satisfaction.