Leaflets or flyers are separate sheets of paper to introduce, advertise and propagate about an event, service or product.
Flyers with postcards, loose paper and small posters are all essential and free forms of information for those who want to attract attention in public but do not have the economic ability or do not feel the need of newspaper ads. However, when marketing became more and more direct in the late 80s and 90s, flyers were more developed, and, now, many flyers can be seen. Some sample sizes such as:

- A4

- A5 (1/2 A4)

- A6 (size of postcard)