Partially tiled bathroom - how high up should tiles go?

[Confuzzled19]

Half way? Thanks!

Like this - high enough that you aren't going to damage paintwork or wallpaper above the tile line.
i.pinimg.com/originals/e5/fb/b6/e5fbb6f8a7835c0e834a84bac8d43039.jpg

I agree with the pp and the pic. Half way like that.