How to figure out common viewport dimensions (not screen sizes) of common devices for adaptive web design?

Question

Looking to find or create a chart presenting a range of mobile/tablet device webpage sizes:

viewport dimensions, so available size within browser window

both height and width because there's actually a range of ratios

in both landscape and portrait modes

The goal is to identify logical breakpoints that make sense across a range of devices, not just the exact dimensions of Apple's products...

(If you're not familiar with responsive web design, here's the article that started it all) http://www.alistapart.com/articles/responsive-web-design

Answer 1

Here is quite a long list of mobile and tablet viewport sizes. It seems 533 is the cut off for tablet to mobile. http://i-skool.co.uk/mobile-development/web-design-for-mobiles-and-tablets-viewport-sizes/