Resolution and Monitor Size

[life24]

Hello,
I have one monitor with 1600*900 pixel resolution. It is 20 inch.
20 inch means just 20 inch in width? and how about height?
Now how many we have Pixel per inch?!

 

[amenx]

Size of monitors is measured diagonally.

PPI info here:

https://en.wikipedia.org/wiki/Dot_pitch

 

[KingFatty]

And you should learn which aspect ratio you prefer. Most monitors are like yours, with 16:9 aspect ratio. It's a rather skinny rectangle. But you can get taller rectangles using 16:10 aspect ratio, 4:3, or go the other way and get even wider/skinny aspect ratio like 21:9. So maybe visit a computer store and see what you like. You can have all kinds of different "shapes" to the monitor, not just how many inches it is.