Calligraphy pens are specialized writing instruments designed for creating beautiful, decorative lettering. They often feature a flexible nib that allows for varying line thickness, making it easier to produce elegant strokes. These pens can be filled with ink or use pre-filled cartridges, and they come in various styles, including fountain pens, brush pens, and dip pens. Many calligraphy pens are used by artists, hobbyists, and professionals for projects like invitations, greeting cards, and artwork. They can be made from different materials, such as plastic or metal, and are available in a range of sizes to suit different writing styles.