How do I increase the font size in all Uxterm windows in Ubuntu 18.04 with LXDE?

How do I increase the font size in all Uxterm windows in Ubuntu 18.04 with LXDE?
I tried this:
xterm -fn -misc-fixed-*-*-*-*-40-*-*-*-*-*-*-*

Even though that increases the font size, it only happens on the new window that gets open. Moreover, the font does not look pretty after doing that.
Thanks