Hello! This thread is for users with a sharper eye than me; and for those who have experienced with Apple Cinema HD Displays and know how they are proportioned in contrast with other items (keyboard, mouse) in the work area (that's the way to find out the screen size according to the pictures). The following screens are obviously the older Cinema HD Displays. I just don't know what screen size. It's either 20", 23" or 30" (the sizes of the older Cinema HD Display series). Aside from the picture I do not have any further information. 1) 2) 3) 4) 5) Thanks in advance!