IAB banner specs

The following IAB banner specifications are for Workbench and Google Ad Manager.

  • Animated banners (animated GIFs) can loop only three times, and the total animation can’t exceed 15 seconds. Repetitive or rapid flashing, blinking in excess, or visually stressful animations aren’t allowed.
  • Assets may only be produced as JPEG, GIF, or PNG.
  • Up to 6x the pixel dimensions are supported for all IAB banners on Workbench. Specifications are optimized for all supported devices.
  • For use of third-party ad tags, see Third-party ad tag technical specs. For ads utilizing any third-party ad tags, we recommend testing your ads with the Workbench Ad Tester.
  • See maximum file sizes below:
    • IAB 320 x 50: 2 MB
    • IAB 300 x 250: 9 MB
    • IAB 320 x 320: 12 MB
    • IAB 300 x 600: 20 MB
    • IAB 728 x 90: 8 MB
    • IAB 970 x 250: 27 MB
IAB banner specs in a variety of dimensions.