Question Phone display size


Next year I will change my phone and I notice that the sizes of most displays are moving towards 6.5" - 6.9".
For example S11+ will have 6.9"

I currently have an s7 edge (5.5"). But overall the phone is quite large with some wide edges ("forehead", "chin").

If the entire surface of the phone were a display, can you approximate what the size would be in inches?
That way I can figure out if a 6.9" would be bothersome or not for me.

5.5" + chin + forehead = 6.9" ?