It varies by manufacturer of the LCD/Panel, the generation of the node, and several other factors. It is typical for all monitors and TVs to be 32" 'class' and they basically consider anything within 1" of 32 to be acceptable for marketing purposes.
When they cut the LCDs from the physical motherglass they are maximizing the number of saleable LCDs by making specific sets of sizes from a single large sheet. It could be argued that they are much closers to the actual size they market before cutting.
3 65" and 6 32" is still a common layout that is extremely efficient on a 2200mm by 2500mm sheet. Which is why 65" and 32" is a very price competitive field.
It varies by manufacturer of the LCD/Panel, the generation of the node, and several other factors. It is typical for all monitors and TVs to be 32" 'class' and they basically consider anything within 1" of 32 to be acceptable for marketing purposes.
I want to buy two monitors and according to display specifications both of them are 31.5". Does it matter that they are 31.5" and not 32"? Does half an inch, matter that much?
I generally don't think so. Still going to be significantly larger than 27" What should matter more is the absolute dimensions to see if you can actually fit these two monitors where you want to put them.
Better than the old CRT days where they basically overreported every single size. They based it on tube size, not viewable area back then. Typical 17" was really 16" and so on.