Collectible postcards are small cards featuring images or artwork, often depicting scenes, landmarks, or events. They are typically sent through the mail but are also collected for their artistic or historical value. Many collectors focus on specific themes, such as vintage postcards, travel destinations, or famous artists. Postcards can be found in various styles, including photographic, illustrated, and handmade. Some collectors enjoy trading postcards with others, while others seek rare or limited-edition cards. The hobby of collecting postcards can provide insight into different cultures and eras, making it a popular pastime for many enthusiasts.