I thought that maybe 21.5" were for 1650x1080 and 22" for 1920x1080 because I found this comment here:

Monitors labeled 21.5" usually have a resolution of 1920x1080, while 22" monitors usually have a resolution of 1680x1050.

But I can see:

  • 22" monitors with 1920x1080 (like Viewsonic VA2248m-LED 22" TFT Monitor 1920x1080 Black)
  • And also 21.5" monitors with 1920x1080(like ASUS 21.5" VE228D 1920x1080)

So, what is the real difference? Smaller screen with same resolution? Same screen but smaller borders?

  • I think it is all down to personal choice. I like bigger screens; some people prefer smaller screens. – Kevdog777 May 20 '13 at 9:50
  • 2
    The obvious correct answer to this question is one has a half inch larger viewing area. – Ramhound May 20 '13 at 10:30
  • A half-inch difference in advertised diagonal measurement is the least-important characteristic of a display that I'd worry about. Aspect ratio, resolution, brightness, color rendition, et al are all more important. – Daniel R Hicks May 20 '13 at 11:13

Sometimes it is down to rounding or honesty issues: checked the detailed specs. When I was last shopping for monitors several advertised as 24" officially had a 23.6" display area when you looked at the detailed specifications. The difference could have been down to simple rounding by marketing and/or the retailers or perhaps there was a bit of visible panel each side with no pixels (that some were counting as they were quoting panel area and others were not as they were quoting actual display area).

If the display sizes genuinely differ by that much then the 22" has about 2.3% larger display area so will be better assuming all other things are equal. If the smaller screen is a better quality panel by other measures then that may be more valuable than the larger area.

Monitors labeled 21.5" usually have a resolution of 1920x1080, while 22" monitors usually have a resolution of 1680x1050.

I suspect that is someone extrapolating a very small set of data points to produce a view of the whole market that is inaccurate.

On a semi related note, those two resolutions are different aspect ratios. 1920x1080 is 16:9 and 1680x1050 is 16:10. The 16:10 equivalent of 1080p is 1920x1200 - about 11% more pixels down. A 22" diagonal at 16:9 is 19.17x10.78 (~206.7 square inches) and at 19:10 is 18.65x11.66 (so less wide but taller, with a slightly larger area at ~217.5"2). Coders and designers tend to prefer a 16:10 screen, though they are generally more expensive due to the economies of scale as far less 16:10 panels are made and sold (because almost all TVs and most monitors are 16:9), and general home users prefer 16:9 as video content is more likely to target that ratio so they see less unused screen space (due to letter-boxing) when playing movies.

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