Size for Ad Unit is Not Found in any Size Mapping. Here’s How To Fix It.

This means you have an ad size configured for the ad unit but it’s not part of the size map. This mistake could mean bids for this ad size won’t be eligible to serve.

Troubleshooting

Step 1: Review your ad unit sizes and determine if all sizes are correct in Ad Manager

ad unit

Step 2: Open your PubGuru header bidding configuration and cross check with the sizeMapping ad sizes and ensure every single one is defined at least once:

ad unit sizes

Step 3: Update sizeMap if necessary (e.g. missed to add 300×250 on a certain midWidth)

Step 4: If an ad unit will run only on a specific device, still add other devices’ minWidths, but don’t add sizes to it.

Example 1:

A mobile unit will have the following size mapping setup:

ad unit size

Example 2:

A desktop/tablet unit will have the following size mapping setup:

ad unit size mapping

Step 5: Save and publish the configuration

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