I noticed that many of the monitors were missing the Screen Opening dimensions. So I did some calculations, and here are my results. Hope this helps. :D
Code:
Size Native Resolution Width x Height (in) Width x Height (cm)
15" 1280 x 720 13.42 x 7.55 34.09 x 19.18
17" 1280 x 768 14.58 x 8.75 37.03 x 22.23
1440 x 900 14.42 x 9.01 36.63 x 22.89
19" 1440 x 900 16.11 x 10.07 40.92 x 25.58
20" 1680 x 1050 16.96 x 10.60 43.03 x 26.92
20.1" 1680 x 1050 17.04 x 10.65 43.28 x 27.05
21" 1680 x 1050 17.81 x 11.13 45.24 x 28.27
22" 1680 x 1050 18.66 x 11.66 47.40 x 29.62
23" 1280 x 768 19.72 x 11.83 50.09 x 30.05
1920 x 1200 19.50 x 12.19 49.53 x 30.96
24" 1920 x 1200 20.35 x 12.72 51.69 x 32.31
25.5" 1920 x 1200 21.62 x 13.51 54.91 x 34.32
27" 1920 x 1200 22.90 x 14.31 58.17 x 36.35
30" 2560 x 1600 25.44 x 15.90 64.62 x 40.39