NMAP.org recently performed an internet-wide scan, using Alexa.com's traffic statistics that presents 'Icons of the Web.' This scan illustrates each website's icon, and the dimensions of the logos are determined by each site's traffic data.
If you've ever wondered exactly how big Google is, look at how it dwarfs every other site, even Facebook which is number two. Icons of the Web is a fantastic visualization that gives the average user a clear way of comparing how popular their favorite sites really are. Try to spot as many sites as you can, before you go blind.