What is a movie poster one-sheet?
A one-sheet refers to the standard U.S. sized 27″x41″ movie poster, usually printed on paper stock. Modern posters are rolled, while most older (pre-1985) film posters were folded. Modern one-sheets can also be printed on both sides, called double-sided, which improves the poster’s appearance in theatre lobby back-lit movie poster frames.
Speaking of sizes, what is misleading is the one-sheet size isn’t necessarily consistent or standard, and can vary by several inches. This is especially true of some border-less full-bleed posters, which may be 26″x40″ or smaller. The sizing can also change between film studios, with each film company in-house ad production group following it’s own sizing and printing standards.