Hi, I'm currently developing an e-commerce system and it is being made responsive. I was looking all over for a list of all the popular devices to see which would work and which ones wouldn't and found this: http://i-skool.co.uk/mobile-development/web-design-for-mobiles-and-tablets-viewport-sizes/ Quite a nice list with physical screen size and pixel ratios for high resolution queries too. Thought it would be helpful to some people