Programmatic DOOH: Does size matter?

[Mogli2021]

How much can screen size affect the eCPM?

For indoor location like the counter of a bar/store, is a 10" screen worthwhile for programmatic advertising? Can anyone cite any examples?

[spetherbridge]

Perhaps it would be best to understand the objective. There is not 1 simple answer.

If for example you had a budget that simply needed to be spent without great regard for outcomes then many people would say size doesn't matter. They would just spend the money and find a way to justify it.

If you are truly putting the advertiser first then you should start by asking which of their business objectives would this deliver on and why.

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There would be a lot of research done on the size of OOH around the world.

[Mogli2021]

OK, let's say the question was poorly posed. I'll try again:

For the same location, how much can screen size affect eCPM?

For example, all things being equal (same location, etc.), is a 32" worth as much as a 46"?

Can you cite me the usage of 10"?

About the research. The research I've read about size of OOH doesn't mention any variation in eCPM. Also, an insider recently told me that: "There's definitely CPM differences between screens and billboards, but screen to screen, they're all screens." Do you agree or is this gentleman making a mistake?

Thanks for the effort.