Kartell Bookworm Matt White Shelf 7 Bookends. Kartell Bookworm Shelving Range by Ron Arad. These artistic, flexible bookshelves designed by Ron Arad; can be made into any desirable shape, holding up to 10kg on each support. The Bookworm makes an attractive eye-catching feature in any room, as well as providing a practical storage solution for books, CDs, DVDs, videos, ornaments, toys and much more. Dimensions : Varies according to shape. Shelf depth 20cm and height 19cm. Overalllength of 7 shelf 320cm.