Hero heading and subheading size

Good day folks, I was just wondering; as I go through the many themes and templates in Webflow or what ever, I notice that the the main headline and sub-headline in the header vary from site to site. Im not sure if there is a best practice on the size for each break-point or is it an arbitrary number. Any ideas?


Here is my site Read-Only: LINK
(how to share your site Read-Only link)

It depends on what you want to express and the title length.