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

For the latest resolution stats change the date range in this url: http://gs.statcounter.com/#resolution-na-monthly-200903-201401

On projects I've built we have media query break point on 1024px width as this is the width of iPad 1, 2 & Mini everything below that is "Mobile" and everything above is iPad+Desktop.

This is how the @nytimes developers are doing it. see: JavaScript Jabber Podcast 093: http://javascriptjabber.com/093-jsj-the-new-york-times-and-javascript-with-eitan-konigsburg-alastair-coote-and-reed-emmons/ Where they describe this at 10:40.

For a more comprehensive list of device resolutions: http://mobile.smashingmagazine.com/2013/03/21/responsive-web-design-with-physical-units/

As always it depends who you are targeting. If you are building a site/app for kids (many of whom will have a low-end android) you may need an "ultra-mobile" version with a break point at 320px (width).