The Adhesion unit is a custom ad unit that is anchored to the bottom of the user’s browser window. The Adhesion is expandable or may remain a static image. As an expand unit, the ad will auto-expand on the first view and stay open for 8 seconds; expand will be user-initiated thereafter. The size of the expandable adhesion displayed to the user is dependent upon the screen size and device of the user.

Expandable Adhesions consist of the following sizes:
970×90 / 970×250
728×90 / 728×200
320×50 / 320×200

Approved Vendor List:

  • Click to view our Approved Vendor list.
  • Please note that this is a living document, so check back regularly for updates. Because some platforms have exceptions and new endpoints are added frequently, this list does not guarantee the ability to serve all formats or ad types for every vendor.  Please ask your AE or Account Manager for the most-up-to-date information.
  • If you do not see your preferred vendor listed, please reach out to your AE or Account Manager who can assist you by submitting a New Vendor Request on your behalf.
  • For Brand Study, Attribution and Viewability vendors, please contact your AE or Account Manager for vendor approval and compliance with our Terms & Conditions.



Ad Specifications

Assets Dimensions File Size
Initial Secondary
Audio/Video 3rd Party 1x1
Large Adhesion 
gif, jpg, png
970x90 100K Polite download: N/A 
User-initiated: N/A
Large Adhesion Expanded
gif, jpg, png
970x250* 150K Polite download: N/A 
User-initiated: N/A
Medium Adhesion 
gif, jpg, png
728x90 100k Polite download: N/A 
User-initiated: N/A
Medium Adhesion Expanded
gif, jpg, png
728x200* 100k Polite download: N/A 
User-initiated: N/A
Small Adhesion 
gif, jpg, png
320x50 40K Polite download: N/A 
User-initiated: N/A
Small Adhesion Expanded
gif, jpg, png
320x200* 60K Polite download: N/A 
User-initiated: N/A
The expand is optional; if not provided, the Adhesion will be a standard display ad that is anchored to the bottom of the browser window.


  • Will auto-expand for 8 seconds, once per user/browser per day.
  • Subsequent expands must be user-initiated on click
  • A close button will be present at all times to allow the site visitor full control over the ad experience.
  • Please do not include a close or expand button for first party served adhesions. The top-left 35×35 pixel area will be overlaid by the expand/close button via the ad template, please do not include these button within creative.
  • All expand/collapse functionality is controlled by the site through ad template

Additional Details

  • HTML5 creative is not accepted for first party served adhesions
  • Adhesion must be served in-house
  • Site reserves right of final approval on creative assets
  • Capping of Auto expand functionality is applied by in-house template

General Guidelines

  • Site reserves the right of final approval on creative assets.
  • The advertising content must be clearly identifiable as an advertisement, as opposed to a link within site content. Advertisers must be clearly identified by name in at least one frame of the advertising content.
  • Ad units that have a white or partially white background must be bound by a visible one (1) pixel non-white box built into the graphic. Creative must still meet size specifications with border.
  • All advertisers must have a privacy policy, no more than (one) 1 click from the linking page to the Ad unit.
  • Ad units must have a linking URL that resolves to an active page.
  • All linking URLs must open in a new window.
  • Placeholder or non-final ad content will not be considered as “proxies” for final creative.
  • ABC OTV’s ad server, Google Ad Manager, is IAB compliantSAS-70 certified, and Media Rating Council (MRC) accredited.