So phones are not really getting longer in aspect ratio (except for some VERY long Sony phones), and they got more display area because of less thick edges. Naturally the mathematical diagonal size is larger, but that is a moot measurement compared with older phones with their 16:9 displays.
I am comfortable with everything less than 70mm width, and because the aspect ratio is kind of settled on 16:9 + navigation keys (or 19:9 complete display), the length is naturally restricted to ~150mm or less.
My A40 has 5.9" but still only 142 to 69mm in size. It does not feel like a 6" thing from 2017, and the reason is its small width and weight. Unfortunately, most new phones have width from 75+mm and weights of 190g or more.