Be aware that the mentioned dimensions for film posters are approximate, and do not have to be exactly in the sizes mentioned above. Standard movie poster sizes (One-Sheet & Bus Stop). Note: Film posters sold in retailing are in poster size, which is 24 x 36 inches. Common landscape (horizontal oriented) format movie Posters also called HALF-SHEET measure 22 x 28, and are generally printed on thicker stock paper.