For some reason nobody makes 2K 24"s anymore -- that was my sweet spot. But now to get the pixel density you have to go way bigger :/ dreading the day the old monitors I have cease working. I like the 24" size but 1080 is just so annoying. I was using 2048x1156 20" monitors back in 2010 and they had better density!

we have become used to retina displays these days so 1080p 24 inch looks 'pixelated'. I sit about 18 inches from the monitor and it looks okay. I find this distance and size most comfortable for me. The 27 inch 4k was too big for my setup and the scaled 2560x1440 is something I would not recommend (was warned about it but didn't listen :P).