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The Best Performing Ad Sizes

How can we choose which ad seize to use?

When we have to choose the best ad sizes we need to take a few parameters into consideration, the IAB, the performance, the ad slot and the demand partners.

The first thing we need to think about, regarding ad sizes, is the device category:

If we are using a responsive layout, we will need to create responsive unit (DFP or Adsense). In responsive units the same ad slot will need to be ajusted betwen mobile view and desktop view. Therefor, if we are using Adsense, we will create a responsive units and implement them on the page. However, if we are using DFP we will need to control the sizes using the mapping.

For mobile we will use the following sizes: 300×250, 320×50, 320×100.

For desktop we can use multiple sizes: 970×250, 970×90, 728×90, 468×90, 336×280, 300×250, 300×600, 160×600.


It is always important to use the IAB standard sizes, because the best demand partners are working with these sizes. If we chose to work with a custom size we will not have a good fill rate. This is because the ad sizes are harder to find.


After that we are ready, we can start adjusting the sizes according to the Analytics. Find here more about messy home clean solution. We can check what is the common screen sizes and adjust the banner sizes to the screen resolution, for example:
If you have a screen with a higher resolution then 1080, you should use 970×250. If you screen is under 1080 you can use 728×90. However, if you screen is under 400, use 300×250.

In Conclusions:

Adjusting the ad sizes, is a “must” process in the monetization process. Therefore, investigate your user behavior and devices and adjust for sizes.

Thank you to the Premium Monetization team for this great article!

If you need help as always, feel free to contact us.

Ad Ops team.


About Maor

Monetization Expert

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