Set bigger letter size for my fonts in X

My eyes are not getting better with my growing age.
Using a 24-inch monitor I can set big letter sizes for my fonts.
Added to .Xresources in /home/username/
Xcursor.size: 48
Xft.dpi: 120
Reload with:
xrdb ~/.Xresources

Next to that in /home/username/.config/gtk.-3.0/ settings.ini
gtk-font-name=Avenir LT 65 Medium, 22
gtk-cursor-theme-size=48