Amazon Ad Server will be sunset in Q4 2024, please visit this page (AAS offboarding information) for offboarding support resources and sunset FAQs. Details shared on that page represent the most up to date information in the Help Center, if you find disparate information in other resources please default to the information in the AAS offboarding information page accordingly.


The single expandable is an expandable format that uses a single, HTML file architecture. It contains both banner and panel markup contained in one HTML file.


Note: If your expandable format requires multiple HTML files (panels), see About expandable banner.

The ad starts in a collapsed state and can be either clicked through to another site or expanded to any size and direction. This format allows the advertiser to show more details to the audience.

Expansion happens:

  • When there is user interaction (for example, click, mouse-over)

  • Automatically when the page loads (auto-expand)

  • Automatically when triggered on a timer (auto-expand)

The expanded state contains a close/collapse button and it can contain video/interactive capabilities:

  • Maximum size is 10 MB (the initial load can be set at 300 KB)


    Note: While Amazon Ad Server ads can be up to 10 MB, ads must also follow the specifications of the publishers or DSPs that will ultimately run the ad.

    Maximum ad size can be increased upon request; however, you should check with your media partner to verify that the ad will not be rejected by the publisher.

  • Ad can have multiple user interactions

  • Ad can contain a video

The ad stays expanded until:

  • User clicks the close/collapse button

  • Mouse-out of the ad (if set)

  • Automatically when triggered on a timer (auto-collapse)

While the single expandable can be customized to any size, industry standard banner dimensions are available within the template, to include a wide array of browsers, screens, and devices.

Collapsed Banner Sizes (before)

Expanded Banner Sizes (after)

160 x 600

300 x 600

320 x 50

320 x 416

300 x 250

500 x 250

728 x 90

728 x 200

Examples of single expandable

These images show the collapsed and expanded states of the 728 x 90 to 728 x 200 expandable template with video.

This image is in the collapsed state.


If a user clicks or moves the mouse over the Expand button, expansion occurs or the user is redirected to another site (click-through).


The ad stays in the expanded state until the user clicks Close, moves the mouse out the ad (if set), or automatically when triggered on a timer (auto-collapse). Additional buttons include:

  • ClickThrough: Records a click-through.

  • UserAction: Records a custom interaction that is tracked in reports.


Note: Some expandable templates contain a video element, which is preset to track video interactions.


Note: This format is supported in unfriendly iFrames.


Click here to preview a demo of single expandable format.

Building a single expandable Ad


Create a single expandable in a code editor

Set Up


Share your ad with your media agency.

single expandable Details




For example:

Banner size: 160 x 600

Expanded size: 300 x 600.

The value that you set in the panel's tab width and height determine the dimensions for the second panel.

The dimensions of the default image for the first panel determine the dimensions for the first panel.

Maximum duration


The publisher or the media technology (for example, DSP) determine the max duration.

IAB recommendation: 30 seconds

Maximum size

10 MB

If your ad does not require resizing capabilities and expand interaction, consider building a rich media banner Banner. For more information, see About rich media banner.

Tag type


For more information about Tag Types, see Amazon Ad Server ad formats.




Examples include Web, Mobile Web, In-app.



iOS 9 and later, Android 4.4 and later


Any modern browser

IE 10.0 and later, Firefox and Chrome recent versions, Safari 7.0 and later

Dynamic Creative


For more information, see Introduction to dynamic creative.



Can be configured to resize responsively.

Local Preview


Ad can be viewed locally, outside the platform.

Publisher Certification



For more information, see About publisher certifications.






Available Metrics

Examples include:

  • Clicks

  • Impressions

  • Viewability

  • UseAction

  • Video Quartiles

  • Video Control

For more information about metrics, see Glossary: dimensions and metrics for Aggregated Reports.

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