Magnetic Slim Line Storage Case by Artbin. The strong magnet holds metal objects in place (calligraphy nibs, blades, paper clips, pins, etc.) making it a very useful case so items stay in the case and not get damaged. Clear plastic cover allows user to see contents inside. Slim case fits easily into pockets, tote bags, or larger storage cases. Overall size: 7 3/8″ x 3 5/8″ x 11/16″.