I have in the launcher set to 1080p one (the 1.5x)
and since I use a 4k Monitor that's only 27" (Xb273K) it's reasonably sized for me, I can't attest to other displays or TVs. It just works for me. It's small, but not hard to read for myself.
Ignore that it says "1920*1200" its running at 4k, I think the launcher defaults to that when you use the other file to change setings.