Top three ad unit sizes according to AdSense

One of the juicy tidbits to come out of the Google AdSense webinar for new publishers is the comment by Phoebe Ho of the AdSense Optimization Team.

The next optimization tip that I’d like to focus on is ad format. … You see our best performing ad format. It’s the large rectangle, 336×280. So the wider ad formats are doing better than the other ones and the reason is that they actually take up fewer lines. And so with every additional line, you have a chance of losing that interested user.

So the wider formats do best so specifically, the top three formats are the 336×280 that you see on the page; the 300×250 medium rectangle; and then the 160×600 wide skyscraper.

No real surprises, but an official confirmation of what the three top performing ad unit sizes are, something that AdSense has not said publicly before.

So to recap, the top three are:

  • 336×280 large rectangle (four ads)
  • 300×250 medium rectangle (four ads)
  • 160×600 wide skyscraper (five ads)

You can view the transcript here, scroll down to the 13th paragraph.

There has been lots of speculation about the best performing AdSense ad unit sizes, and the 336×280 has always been the best ad unit size in my own personal experience. But even the best performing ad unit size will not perform well on a site if it does not suit the page layout.

This sounds like something that should be added to the AdSense Optimization Tips page.

There is a comparison discussion about the top 3 ad units over at the Search Engine Watch forums.

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4 comments to Top three ad unit sizes according to AdSense

  • Great news, i never used the 336×280 ad, I will test it right now !! I think sometimes will be hard to fit but if it means more money… I go to hard working 😀

  • AdSense AdSense AdSense…

    Links to a bunch of stuff mentioned on JenSense, including a new AdSense advisor, how to report invalid clicks, and what are the best size ads to use.

  • The 300×250 and 336×280 layouts don’t work with all sites. I can’t figure out any appropriate place to put them on my site, for instance. But the 160×600 wide skyscraper blends in well with my sidebar and brings in quite a bit of money (with the rest brought in by the 468×15 link unit, which also way exceeded my expectations).

  • I think 160×600 wide skyscrapper is very good. My left sidebar already contents menus. I don’t know what to do with right sidebar until I read this article.

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