4K monitor for graphic design or not?

[mixart]

I want a new bigger screen with my Macbook Pro Retina (late 2013) for graphic design like web design, logos, posters, magazines, advertisements, packaging, etc.

Should I go for a 27" IPS 2560x1440 monitor or 4K like Dell 24" UP2414Q or maybe a 31.5" monitor? I like the idea that Dells UP2414Q can pixel-doubled in 'Retina' mode, which makes content appear as it does on the late-2013 MacBook Pro with Retina display screen while maintaining sharpness.

I don't know if the 31.5" 4K monitor will be too huge for me.

I also like the LG 34" 21:9 because it is less higher than a 31.5" 16:9 monitor

 

[h9826790]

It's never too big. I am now using a 84" 4K TV, it clearly shows all the details. Cant' get anything better than that.

I never use any 21:9 monitor, so can't comment on that. But for graphic design, I will go for at least 27". I did use both 24" and 27" cinema display. The 27" is a much better option. Even though 4K in 24" sounds very impressive, but my eye told me that I prefer a bigger screen to see the details rather than higher resolution in a smaller display (at the correct distance, your eye should not able to distinguish the pixel in 2560x1440 27" display already). Just think about a normal iPad screen vs a retina iPhone screen. Which one is better for graphic design? the retina iPhone looks extremely good, but not very helpful when you have to work on it.