Found

Browser size

An interesting graphic showing you how much viewport area (where the web content is, between the scrollbars, toolbars, and so on) web users see. Made useful because you can load your own websites in for comparison.

It’s worth remembering there is no page fold because every web browser is capable of scrolling and every web user knows how to scroll. Google has provided a guide for where to put the most important information and action elements on the page, not a guide for how short and narrow to make your web pages.