The biggest, baddest, permanent marker around! The Pocket Shark features walls that are 4 times thicker than conventional markers, built for impact and will survive the meanest blows and roughest treatment imaginable. Features a screw on cap will stay in place and won't pop off like a regular marker and leak all over your clothes. Clip it to a shirt or coat pocket, or carry in your purse, pack or brief case. Width: 22.2 mm