[Theme Horse Support Team]

hi @valerio-avvisati,

The height and width of the header is not in fixed ratio. We have developed the header in a responsive style so the background image gets covered in a responsive way.
The width will changes according to the users screen size and Height will changes according to the element uses in header. Like if you remove advertise then height will decreases a bit low and if you add the bigger logo image then the height increases and these things also affects on smaller devices as well So It’s not possible for us to provide you the exact ratio for header.

If you really need the exact ratio then you have to hire a developer for customizing the codes accordingly to your needs.

Thanks.