August 11, 2026
Poster dimensions in the United States are defined by a set of practical standards that developed from print industry constraints, retail display hardware, and the economics of large-format printing. There is no single official governing body that mandates poster sizes – these are industry conventions that have settled into defaults because they work at scale and are economically efficient. Understanding the full range of poster dimensions, and knowing which dimensions serve which purposes, is foundational for any brand, designer, or campaign manager ordering printed materials.
At American Guerrilla Marketing, we work with printed posters daily across street campaigns, event marketing, and guerrilla marketing activations in cities nationwide. Our team in Industry City, Brooklyn coordinates print production and deployment for campaigns that span single local markets to multi-city national runs. The poster dimensions question comes up on every campaign brief. This guide gives you the complete answer.
We cover the dimensions of every standard US poster format, what each is used for, how to specify them correctly for print, and how they relate to the international metric sizes your European or global vendors will reference.
The following table covers all standard US poster formats with dimensions in inches, centimeters, and the pixel counts needed at common print resolutions. Use this as your master reference.
| Size (In) | Inches | Centimeters | 300 DPI Pixels | 150 DPI Pixels |
|---|---|---|---|---|
| Small | 11 x 17 | 27.94 x 43.18 | 3300 x 5100 | 1650 x 2550 |
| Small | 12 x 18 | 30.48 x 45.72 | 3600 x 5400 | 1800 x 2700 |
| Medium | 18 x 24 | 45.72 x 60.96 | 5400 x 7200 | 2700 x 3600 |
| Retail | 22 x 28 | 55.88 x 71.12 | 6600 x 8400 | 3300 x 4200 |
| Standard | 24 x 36 | 60.96 x 91.44 | 7200 x 10800 | 3600 x 5400 |
| One-sheet | 27 x 40 | 68.58 x 101.60 | 8100 x 12000 | 4050 x 6000 |
| Large | 36 x 48 | 91.44 x 121.92 | 10800 x 14400 | 5400 x 7200 |
| XL | 48 x 72 | 121.92 x 182.88 | 14400 x 21600 | 7200 x 10800 |
The 11 x 17 inch format is the smallest format that functions as a poster rather than a flyer. At 11 inches wide by 17 inches tall, this tabloid format gives you enough surface area for a headline, a visual, and basic information that is legible at 4-6 feet. It is the default for high-volume street seed campaigns where cost per unit and total coverage count are the primary variables.
At 300 DPI: 3300 x 5100 pixels. At 150 DPI: 1650 x 2550 pixels. Minimum text size for legibility at 5 feet: 36pt body text, 72pt+ headline. Add 0.125 inch bleed on all sides for full-bleed designs. The 11 x 17 format is widely available from standard desktop printers capable of tabloid (11 x 17) output, making it the only poster size that can be produced without professional print equipment when needed.
The 18 x 24 inch format is the first true campaign poster size. At 18 inches wide by 24 inches tall, it provides enough visual real estate for a strong design that communicates at 10-12 feet. The 18 x 24 format fits standard poster frames at most retail environments and transit displays. It is the workhorse format for indoor campaigns, venue promotion, and outdoor applications where the audience passes within close range.
At 300 DPI: 5400 x 7200 pixels. At 150 DPI: 2700 x 3600 pixels. For outdoor applications where posters will be wheat-pasted or applied to surfaces, use 80 lb uncoated text paper. For indoor display in frames or window mounts, 100 lb matte or gloss text works well. Minimum headline text for 10-foot legibility: approximately 100pt.
The 24 x 36 inch poster is the standard. This is the format the market has settled on as the default for street campaigns, event marketing, and outdoor advertising at human scale. At 24 inches wide by 36 inches tall, it is large enough to demand attention from across a street and practical enough to deploy in quantity. Our wheatpasting campaign team deploys thousands of 24 x 36 posters per month across US markets.
At 300 DPI: 7200 x 10800 pixels. This is a large file – approximately 220 MB as an uncompressed TIFF. Save as PDF for vendor submission. At 150 DPI: 3600 x 5400 pixels, which is acceptable for large-format inkjet output at normal street viewing distances. Bleed: 0.125 inch on all sides for full-bleed designs. For wheat paste applications: 80 lb uncoated text, printed with pigment-based inks that resist moisture better than dye-based inks.
The 27 x 40 inch one-sheet is the cinema industry standard for US movie poster display. At 27 inches wide by 40 inches tall, the one-sheet has a distinctive tall, narrow format engineered for backlit lobby display cases in movie theaters. The proportions are slightly different from the standard 24 x 36 ratio, giving the one-sheet a more elongated vertical composition.
Outside of cinema marketing, the 27 x 40 sees limited use because standard outdoor poster frames are designed for 24 x 36. If you are producing theatrical marketing materials or collectible film posters, this is your format. For general campaign work, 24 x 36 is the practical choice at this scale.
The 36 x 48 inch format is large-format territory. At 3 feet wide by 4 feet tall, this poster occupies significant visual real estate and is readable from 35-40 feet. AGM uses this format for premium outdoor wall placements, construction barrier campaigns, and high-traffic corner locations where the larger footprint justifies the cost premium over 24 x 36.
At 150 DPI (recommended for this size): 5400 x 7200 pixels. At 300 DPI (if required): 10800 x 14400 pixels. Large-format inkjet presses produce excellent quality at 150 DPI for 36 x 48 at normal outdoor viewing distances. Print on heavy-weight paper (100 lb text or heavier) for durability at this scale. Installation typically requires two people and more paste volume than smaller formats.
US poster dimensions in inches do not align exactly with international ISO metric sizes. If you work with European vendors or run international campaigns, you need to know the metric equivalents and where the gaps are.
Never assume a file built to US inch dimensions will transfer directly to an ISO metric press without adjustment. The differences range from 2-9 percent per dimension and cause either white borders or content cropping depending on which direction the adaptation goes.
The right poster dimensions depend on the viewing environment. Here is how our team approaches size selection for different placement contexts.
Street-level placements where pedestrians pass at 5-20 feet: 24 x 36 inches as primary format. Secondary: 18 x 24 for additional coverage at close-range surfaces. Premium corner walls: 36 x 48. The goal is a headline visible from across the street and enough design presence to stop attention in a visually competitive environment.
Bars, clubs, cafes, gyms, retail stores: 18 x 24 inches is the workhorse. It fits most standard display holders, applies easily to windows and doors, and is readable at typical indoor distances of 6-15 feet. For large venue lobbies: 24 x 36 on a floor easel or mounted panel.
For campaigns covering both indoor and outdoor placements from a single print run, 18 x 24 is the most versatile choice. It works across more environments than any other single size. If the campaign has significant outdoor component, order a portion of the run in 24 x 36 for the outdoor locations and 18 x 24 for the indoor placements.
The most common poster file errors come from incorrect document setup. Setting up the document dimensions correctly before designing prevents problems that cannot be fixed without rebuilding.
File > New. Set width and height to exact poster dimensions (e.g., 24 x 36 inches). Set Units to Inches. Set Bleed to 0.125 inch on all sides for full-bleed designs. Color mode: CMYK for print. Resolution setting here applies to rasterized elements – keep vector elements at any size. Export as PDF with press settings for vendor submission.
File > New Document. Enter width and height at exact poster dimensions. Under Bleed and Slug, enter 0.125 inch bleed. Set intent to Print and color mode to CMYK. The InDesign document handles text and vector elements at full resolution; raster image elements should be placed at 300 DPI minimum at 100% of their placed size.
Setting up at the wrong aspect ratio and scaling after design completion. Building a 24 x 36 design and scaling to 18 x 24 (different aspect ratio) without redesign. Using screen-resolution (72 DPI) images in a print file. Not adding bleed to a full-bleed design. Designing with measurements in pixels rather than inches for a print output.
If your posters will also be displayed digitally (social media, website, digital signage), you need different dimension specifications. Digital display uses pixels and screen aspect ratios, not print inches.
Common digital equivalents for standard poster formats at screen resolution: A 24 x 36 print poster adapted for Instagram Story (vertical) would use 1080 x 1920 pixels. For a Facebook or Instagram feed post (approximately 4:5 ratio): 1080 x 1350 pixels. For a widescreen digital display: 1920 x 1080 pixels (landscape). Digital dimensions do not map directly to print dimensions – a separate digital design is the professional approach, not a scaled-down version of the print file.
Understanding poster dimensions in inches is only useful if you also know how to translate those dimensions into correct print file specifications. The most common technical error in poster production is building a file at the correct physical dimensions but at the wrong resolution, producing a print that looks fine on screen but shows pixelation or softness when printed at full size.
The key principle: resolution requirements decrease as poster size increases because larger posters are viewed from greater distances, reducing the per-inch detail that the eye can resolve. At 11 x 17 inches (viewed from 4-6 feet), 300 DPI is standard. At 18 x 24 inches (viewed from 8-12 feet), 300 DPI produces excellent quality and 200 DPI is acceptable. At 24 x 36 inches (viewed from 15-25 feet), 300 DPI is professional standard; 150 DPI is acceptable for wide-format inkjet output. At 36 x 48 and larger (viewed from 25+ feet), 150 DPI is the production standard; 100 DPI is acceptable.
The practical implication: do not reject a 150 DPI print file for a 24 x 36 poster. The image quality at 150 DPI will be indistinguishable from 300 DPI when the poster is viewed at its intended distance. The 300 DPI standard exists for formats that are handled and read at close range, not for outdoor advertising formats viewed from across a street.
At 300 DPI, a 24 x 36 inch raster file is approximately 7200 x 10800 pixels – about 220 MB uncompressed. A 36 x 48 at 300 DPI is approximately 10800 x 14400 pixels – nearly 440 MB. Managing these file sizes requires planning. Keep vector elements (text, logos, geometric shapes) as vector rather than converting to raster. Only rasterize background images and photos. Save the final print-ready file as PDF, which compresses vector elements efficiently without quality loss. High-quality PDF files for 24 x 36 posters with mixed vector/raster content typically compress to 20-60 MB.
Standard street poster dimensions are distinct from the dimensions used in formal transit and outdoor advertising systems. Understanding the difference prevents confusion when brands want to combine street poster campaigns with formal outdoor media buys.
Street posters (wheatpaste, guerrilla, and permitted outdoor) use the dimensions covered throughout this guide: 18 x 24, 24 x 36, 36 x 48 inches. These are produced at commercial print vendors and installed directly by campaign teams. Transit advertising – bus shelter panels, subway station posters, and transit car cards – uses standardized dimensions defined by each transit authority. These formats require buying media space from the transit authority and submitting print-ready files to their specification.
Common transit advertising dimensions: bus exterior kings (30 x 144 inches), bus exterior queens (30 x 88 inches), transit shelter panels (68 x 48 inches), subway station mosaic walls (48 x 70 or 48 x 84 inches). None of these match standard street poster dimensions. They require separate production and are priced through media buying, not through standard print vendor relationships.
AGM’s billboard advertising team advises on formal transit media in combination with street-level campaign work. The two types of advertising are complementary – formal transit media reaches mass audiences; street poster campaigns reach specific neighborhood audiences with cultural immediacy that transit media cannot replicate.
Art prints and collectible poster formats follow the same general dimensions as campaign posters but with some additions from the fine art printing tradition. Common art print dimensions in the US include the standard campaign sizes plus several art-specific formats: 18 x 24 (standard), 24 x 36 (standard), and also 20 x 24 (photo standard), 24 x 30 (gallery format), and 16 x 20 (photo print standard). For limited-edition screen print posters, artists and print shops often use 18 x 24 as the standard size, following the band poster tradition that has standardized on this format for decades.
Collectors’ value for art posters is sometimes related to the specific dimensions, particularly for vintage posters and first-edition prints. A 27 x 40 one-sheet in original cinema format has different collector value than a 24 x 36 reprint of the same artwork. For anyone producing or collecting art posters where dimension is part of the provenance, the original source dimensions matter and should be preserved in reproductions to maintain collector value.
The standard US poster dimensions are 24 x 36 inches. This is the most widely used campaign poster size in the US. The 18 x 24 inch format is the second most common. For cinema, the standard is 27 x 40 inches (one-sheet).
A 24 x 36 inch poster is 24 inches wide and 36 inches tall. In centimeters, that is 60.96 x 91.44 cm. In millimeters, 609.6 x 914.4 mm. At 300 DPI, the print file should be 7200 x 10800 pixels.
Common US poster dimensions in inches: 11 x 17 (small/tabloid), 12 x 18 (small poster), 18 x 24 (medium standard), 22 x 28 (retail standard), 24 x 36 (primary street poster), 27 x 40 (cinema one-sheet), 36 x 48 (large format), 48 x 72 (extra large).
US movie poster dimensions are 27 x 40 inches (the one-sheet), which is the standard for cinema lobby display. The mini-sheet format is 22 x 28 inches. International cinema markets use A1 (23.4 x 33.1 inches) as the equivalent standard.
At 300 DPI (recommended for high-quality print), a 24 x 36 inch poster should be 7200 x 10800 pixels. At 150 DPI (acceptable for large-format viewing at distance), the file would be 3600 x 5400 pixels. Always set the document resolution in your design software rather than resizing a low-resolution image.
Street posters typically range from 18 x 24 to 48 x 72 inches. Traditional outdoor billboards are much larger: a standard bulletin billboard is approximately 10.5 x 22.8 feet. Posters and billboards are entirely different scale categories.
No. The US uses inch-based sizes (18×24, 24×36, etc.). Most other countries use ISO A-series metric sizes (A2, A1, A0). The nearest international equivalent to the US 24 x 36 is A1 (23.4 x 33.1 inches), which is slightly smaller.
Campaign Architect — American Guerrilla Marketing
The standard US poster dimensions are 24 x 36 inches. This is the most widely used campaign poster size in the US. The 18 x 24 inch format is the second most common. For cinema, the standard is 27 x 40 inches (one-sheet).
A 24 x 36 inch poster is 24 inches wide and 36 inches tall. In centimeters, that is 60.96 x 91.44 cm. In millimeters, 609.6 x 914.4 mm. At 300 DPI, the print file should be 7200 x 10800 pixels.
Common US poster dimensions in inches: 11 x 17 (small/tabloid), 12 x 18 (small poster), 18 x 24 (medium standard), 22 x 28 (retail standard), 24 x 36 (primary street poster), 27 x 40 (cinema one-sheet), 36 x 48 (large format), 48 x 72 (extra large).
US movie poster dimensions are 27 x 40 inches (the one-sheet), which is the standard for cinema lobby display. The mini-sheet format is 22 x 28 inches. International cinema markets use A1 (23.4 x 33.1 inches) as the equivalent standard.
At 300 DPI (recommended for high-quality print), a 24 x 36 inch poster should be 7200 x 10800 pixels. At 150 DPI (acceptable for large-format viewing at distance), the file would be 3600 x 5400 pixels. Always set the document resolution in your design software rather than resizing a low-resolution image.
Street posters typically range from 18 x 24 to 48 x 72 inches. Traditional outdoor billboards are much larger: a standard 14-sheet bulletin is 10.5 x 22.8 feet; a 30-sheet poster panel is 12.5 x 27.5 feet. Posters and billboards are entirely different scale categories.
No. The US uses inch-based sizes (18×24, 24×36, etc.). Most other countries use ISO A-series metric sizes (A2, A1, A0). The nearest international equivalent to the US 24 x 36 is A1 (23.4 x 33.1 inches), which is slightly smaller.
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American Guerrilla Marketing — Los Angeles
Street-level campaigns in Los Angeles and nationwide. Wheatpasting, LED trucks, street teams, and more.
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