<http://schema.org/description>
"Google announced AdSense publishers can now create custom ad size units for both text and display ads on their web sites.Google said, \"Custom sized ads behave just like their standard size counterpart"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-adsense-custom-ad-sizes-17802.html>