A pen-wig is a decorative accessory typically worn on a pen or quill, designed to enhance its appearance and provide a whimsical touch. Often made from materials like feathers or fabric, pen-wigs were popular in the 17th and 18th centuries, symbolizing creativity and individuality. They serve both aesthetic and functional purposes, adding flair while sometimes providing a grip for writing. Today, pen-wigs are considered a quirky collectible or novelty item.