4.8 inch iPhone rumors vs. some math done
I don't know if 4.8 inch iPhone rumors are true or not, but I did some math, and it gave out some interesting values.
If we add one more row of icons horizontally, and one more vertically, iPhone screen size would change to 103.85 x 65.2 [mm]. That gives diagonal size value of 122.62 [mm] which is 4.828 inches - and that almost perfectly aligns with rumors.
Also, because I was bored I checked what resolution that would be, and for all interested it's: 1312 x 816 [px]