You can establish a relationship between the cursor and mouse. Then the best from there is 0% monitor distance conversion to games. If you made it 1:1 relationship, then the sensitivity would be extremely slow.
For a 24.5" monitor at 1920x1080, you are looking at 89.9 DPI and 127.8 cm/rev in CS:GO. You can always amplify the sensitivity. The term for this is control-display gain, which describes the proportion between movements in the control space to the movements in the display space.
I personally use a control-display gain of 5 (1800 CPI, with WPS reducing it to 450 dots/pixels per inch).
Formula to find the CPI for desired CD-Gain is: (Gain * Sqrt(PixelsHorz^2 + PixelsVert^2))/(ScreenSize * WPS * DPIScaling) = CPI