~.26
17"=~374mm
Monitor has a 5:4 ratio. Using basic arithmetic:
W=~338mm
H= ~270mm
Now, the native resolution of each dimension.
W=1280
H=1024
Because of the nature of LCDs, the native resolution is the actual number of pixels. Precise and exact.
To find pixel pitch, divide the dimension by resolution.
W pixel pitch=338/1280
H pixel pitch=270/1024
Using that formula you could figure out either the screen or pixel pitch given the resolution. Usually Desktop LCDs of the same size all have the same pixel pitch. It's very rare to find one finer due to cost competitiveness to CRTs.
In addition, LCD and CRT pixel pitches are not comparable. First off, CRT pitches are not square. They're not quite as clear either. LCD pitches, even though they're "bigger" will always look betterdue to their nature.