This tool allows you to view the traffic of a website according to Alexa data.
Alexa traffic data
Alexa™ is a U.S. company that provides data on the global traffic of websites. These statistics are extrapolated from software that collect web navigation data (such as Alexa Toolbar ?) installed directly on users' browsers. These figures are often considered unreliable in absolute value, but still can assign a ranking relevant to websites.