What are the standard digital billboard sizes, specs, and file formats?

Short answer

Digital billboards require pixel-perfect files matched to each network's exact dimensions, typically exported as RGB JPEG for static or MP4/H.264 for video. Copy should stay under 9 words, contrast should be high, and specs must be confirmed with the media owner before production begins.

Common digital billboard sizes and pixel dimensions

There is no universal standard for digital billboard dimensions. Physical size and pixel resolution vary by location, network, and hardware manufacturer, which means a file built for one board will not necessarily work on another.

Common physical formats and example pixel matrices:

• 14 x 48 ft (Large Format): One of the most common roadside sizes in the US. Example matrices include roughly 920 x 260 pixels or 854 x 2928 pixels depending on pixel pitch and manufacturer.
• 10 x 30 ft and 10 x 36 ft (Medium Format): Used in suburban and urban highway settings. Example resolutions: 610 x 1830 or 610 x 2196 pixels.
• 12 x 24 ft (Wide Format): Common for street furniture and transit panels. Example resolution: near 1350 x 650 pixels.
• 10 x 10 ft (Square Format): Used for smaller digital signs. Example matrix: around 312 x 312 pixels.

Aspect ratios follow from the physical format: landscape boards typically run 16:9 or approximately 1:3.4, portrait panels run 9:16, and square formats are 1:1. Always obtain exact pixel dimensions from the network before designing assets. Auto-scaling or stretching fixed artwork causes distortion and is a leading reason for file rejection.

File formats, codecs, and technical specs

Static images: JPEG is the most widely accepted format for digital billboard creative. PNG is sometimes accepted and useful when sharper edges are needed. All static files must be saved in RGB color mode; CMYK is a print standard and causes color problems on LED displays.

Video and animated content: Where full-motion is permitted, the standard is an MP4 container with an H.264 codec. MOV files are less common and may be unsupported. Audio tracks are generally not accepted on roadside billboards for safety reasons, though they may be permitted in indoor or transit DOOH environments.

Recommended video specs:

Pixel density (DPI) is largely irrelevant for digital displays. The critical factor is matching the exact pixel dimensions required by the network. Export artwork at 100% scale with no upscaling.

Duration, design rules, and legibility

Duration: Static digital billboards rotate every 6-8 seconds, with multiple advertisers sharing the loop. Full-motion or animated content in indoor and transit environments typically runs between 5 and 15 seconds. Creative should communicate its message in under 10 seconds.

Copy length: Limit text to 7-9 words, including the business name or logo. One main idea per ad, no multiple offers or calls to action.

Visual design: Use bold sans-serif fonts sized for distance, strong foreground-to-background contrast, and a clear hierarchy: primary headline, supporting image, then logo or call to action. Leave roughly 10% margins on all sides to prevent cropping or edge distortion.

Legibility testing: Zoom artwork out to 10% of screen size and squint. If the headline is not immediately readable, it will not work at 200 feet from a moving vehicle.

Preflight checklist to avoid rejection and delays

Rejections most commonly result from incorrect pixel dimensions, unsupported formats or codecs, excessive file size, poor legibility, or content that violates network policies. The following checklist addresses each risk:

1. Confirm specs with the media owner before production: pixel dimensions, orientation, static vs. video, accepted formats, maximum file size, duration limits, and content restrictions.
2. Prepare static files as high-quality RGB JPEG or PNG at exact pixel dimensions with no scaling.
3. Prepare video files as MP4/H.264 at 25-30 fps, constant frame rate, no audio unless explicitly permitted, within the network's file size limit.
4. Design checks: 7-9 word maximum, high contrast, large bold fonts, key elements within safe margins, no unnecessary transparency or alpha channels.
5. Technical checks: Confirm RGB color mode, verify video duration and frame rate, test smooth playback on a device before submission.
6. Content compliance: Review for prohibited content, obtain co-op or brand approvals if required.
7. Delivery: Use the naming conventions specified by the network, include placement maps linking files to locations, and retain source files and backups.
8. Confirmation: Request written approval from the network and proof of posting or playback reports after launch.

Because billboard sizes and aspect ratios vary significantly across networks, one file rarely works for multiple placements. Build separate versions for each board's pixel dimensions and orientation rather than relying on cropping or scaling at delivery.

How AdQuick handles digital billboard creative

Planning billboard advertising through a marketplace simplifies the spec-gathering step that most delays are traced to. Rather than contacting each operator individually, buyers can access placement details, confirm creative requirements, and submit files for multiple networks in one place. The platform supports both static and video formats across roadside, transit, and indoor DOOH inventory, with tools to track campaign delivery and request proof of posting after launch.