Admob - Smartbanner Cause Violation, What manual banner size should i use ?

Hi guys.

Iv only used smartbanner and its perfect on my 2 test devices - res 540/960 (Resize fill window). Admob said im in violation - "banner overlap content" , Iv just gone through my game and set properties "standard" => set banner size "0".

Question ,320-50 banners seem the biggest on my device, no overlap of content , 468 banners are smaller now , Will max size of banners im seeing on my device now be universal on all device's ? (area they cover)

should i be using different properties and size ?

thanks

I cant work this out ! do real ads act differently to the test ads in sizes and stuff , i have never seen an overlap even using smartbanner and no size set. just used an old file with smart banner and a friend just let me use a massive screen 4k screen, also tested on my main phone thats 720x1560 .
Yet test banners are even smaller and well with in the allocated space ( looks ugly as they have a massive space around the ).
I cant work out what the violation is...

How do you experienced game devs set your banners in fusion to retain size ?

thanks.

Seems ok now set as standard "fingers crossed i guess", cheers madmac il keep it as standard for sure.