The size of TFT LCD refer to its diagonal distance.For instance, panels of 17 inch,we can tell their diagonal distance is 17inches,about 43.2cm.
Within the view distance,the bigger the size of TFT LCD is, the wider the view is. Considering the resolution and distance from the work table, 22 inch~24inch is the most suitable size. And if used in living room for integration functions such as TV , the size of TFT LCD can be more bigger.
So it has to come back to the application, when we select the optimized size.
AUO LCD:https://www.auo-lcd.com/products/auo-lcd-screen/
INNOLUX LCD:https://www.auo-lcd.com/products/innolux/