IAB Standards

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  • Image
  • Display

IAB Standards Flexible 1:4 Skyscraper ad specs

IAB Standards Flexible 1:4 Skyscraper ads are vertical 1:4 still images, at least 160×640 px, up to 0.15 MB per file, delivered as JPG, PNG, GIF, or HTML5. They run in the Left or right rail placement on IAB Standards.

  • min 160×640 px
  • 1:4
  • 154 KB
Test a creative

Visual

Minimum size
160 × 640 px
Aspect ratios
1:4
Max file size
154 KB
File types
JPG, PNG, GIF, HTML5

Notes & source

  • Flexible unit: keep the 1:4 ratio and scale between 160×640 and 240×960 density-independent pixels (dp)
  • Minimum width and height are in dp, which equal pixels at 1x density
  • Build at 2x for sharp screens
  • Static image size 240×960 dp
  • Initial load up to 150 kB, subload up to 300 kB
  • Max file size is the initial-load k-weight: IAB applies the initial load limit to static image ads and backup images
  • Weights are gzipped and count every file the ad requests before the page load event
  • Subload starts after it, and user-initiated loads are unlimited
  • At most 10 file requests during initial load
  • Exempt shared libraries add up to 50 kB
  • Ads stay muted unless the user starts audio, and must be clearly distinguishable from content (a border is the usual way)
  • On 3G or slower connections IAB asks for file weights 30% below these limits

Official source · checked not yet

Official source · checked not yet

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