Mobile and desktop screen size statistics

Question

Where can I find statistics on mobile and desktop screen sizes?

Im making a responsive site and specifically what im trying to find out is weather their is a size g

Answer 1

If one looks at statcounter.com and compares the numbers with sources like W3C then can be skeptical about that how they got the numbers.

If you wanna get a real stats, plz visit this site: browser display, high screen resolution