Using 30 standard-sized pencils, and this kit, you can create an icosahedron-shaped object of about 38 cm or 15 inch in diameter. Use it as a cool lampshade, or just as fun and educational object to have around. Fits standard hexagonal (colour) pencils of about 7.0 mm cross section - measured at the smallest diameter. Any length of the pencils will work, as long as they're all the same. Assembly may leave slight marks on pencils.