I get Pixel phones to get stock Android and reliable updates and the smallest I can get are ~6 inch phones. If a 5 inch Pixel was released I'd buy it in a heartbeat
I have the Pixel 3a right now. It's a 6" phone with a 5.6" display. I was referring to total phone size. On top of that I add a phone case because I've dropped previous phones and caused (slight) damage so it's an absolute must for me. I use the pixel fabric cases google sells which only increases my dimensions to 6.12 in (155.54 mm) x 2.93 in (74.33 mm)