How to get physical size of window

Help & Support
1

Is there some more or less robust way to get (on mobile at least) the physical dimensions of the drawing surface?

something like graphicsdevice.width * deviceDPI

I want to render a sphere that is exactly 1 real-world cm in diameter on any screen.

2

This is more of a browser/front end centric question . Stackoverflow has some interesting replies https://stackoverflow.com/questions/21680629/getting-the-physical-screen-dimensions-dpi-pixel-density-in-chrome-on-androi

3

So then, if I query graphicsDevice.width, is the width reported in device independent CSS pixels? If no, how would I get them?