Loss reason 203: Creative Filtered - Size Not Allowed
What it means
Creative dimensions did not fit the impression.
The exchange reports this code by expanding the ${AUCTION_LOSS} macro in the bid's loss notice URL (lurl). A bidder that does not set lurl never sees it, and never learns why it lost.
What the exchange checked
The exchange compared the creative's pixel size with the sizes on the impression. For a banner that is banner.w and banner.h, or any pair in banner.format. Video uses video.w and video.h.
What to change
Send a size the impression listed. When banner.format is present, any listed pair is eligible. A single w and h, with no format array, means that size.
Related
- The full loss reason table
${AUCTION_MIN_TO_WIN}: the price-discovery companion macro- Loss reason 201: Creative Filtered - Pending Processing by Exchange
- Loss reason 202: Creative Filtered - Disapproved by Exchange
- Loss reason 204: Creative Filtered - Incorrect Creative Format
- Loss reason 205: Creative Filtered - Advertiser Exclusions