Leaflet is a sheet product, which is one of the most popular types of advertising products. Leaflets can be both single- and double-sided. There is no defined leaflets format, they can be of different sizes from A6 to A3.

Flyer is a small information booklet used as handout promotion. Often flyer can be a free pass, admission ticket or invitation to any event. Generally flyers are made of the following sizes: 1/3 A4 98×210 mm, A5 148×210 mm, A6 105×148 mm.