5 1/4" long. Black metal barrel with black pocket clip. Black ink. Writes in any weather. Writes at any angle, even upside down. Pressurized cartridge. Ink is permanent, will not dry out. Extreme temperatures: -30°F to 250°F. Skips less - writes over water, grease, fingerprints and photographs. Perfect for use on Rite in the Rain field books and paper.