IAB Standards

Published Modified

  • Image
  • Display

IAB Standards Portrait ad specs

IAB Standards Portrait ads are vertical 2:7 still images, measured at 300×1050 px, up to 0.25 MB per file, delivered as JPG, PNG, GIF, or HTML5. They run in the Sidebar placement on IAB Standards.

  • 300×1050 px
  • 2:7
  • 256 KB
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Visual

Dimensions
300 × 1050 px
Aspect ratios
2:7
Max file size
256 KB
File types
JPG, PNG, GIF, HTML5

Notes & source

  • Initial load up to 250 kB, subload up to 500 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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