Everyone is different but I personally can't go back to something under 5 inches.
Some of us aren't that lucky!

I got my 6 repaired yesterday and it's funny what a difference 2 weeks can make. It feels like a toy phone now I can't believe I had used that size for 2 years. It just feels so small and that it will get lost in my hands.
Tempted to dig my 4 out to see how much smaller that feels now too!