11 By 14 Poster Size. Your poster is smaller than that about the size of a magazine laid open. The correct poster size will determine how your visual and textual elements come together.
To get a better understanding of how poster sizes scale up in comparison to one another a0 is the largest size at 841mm by 1189mm then a1 is exactly half of this size measuring 594mm by 841mm. The a0 size has an area of 1 square metre. Factors such as the poster type quantity and purpose go into choosing the right poster dimensions.
A2 is half of a1 a3 half of a2 and so on until you reach a very small a10 size measuring just 26mm by 37mm.
11 x 17 this size is slightly larger than the previous dimension. Smallest poster 11 x 17 inches. The later are the most common standard poster size for movie posters. Your poster is smaller than that about the size of a magazine laid open.