The problem is that the usual display sizes for laptops are always rational numbers with 15.6 "or 17.3". What sizes are there for displays for laptops above in inches? Is there a good table?
There are no "usual laptop sizes" above 17.3 ". 17.3" is already the largest usual size. Above that there's also the question of what mobility it looks like.
If you need a bigger screen, you can connect a monitor
I only know 18.4 ". https://geizhals.de/...at&hloc=de