They do make one with a 4" display! I'm a small phone liker. After spending years on an iPhone 13 Mini and wishing it was a little smaller, I got a Motorola Razr Ultra last year and I've been very happy with it. It has a fully functional 4" external display, and unfolds into a full-size smartphone/phablet display for when you need it. I use the little external display probably 80% of the time, but it's handy to unfold when you need it for Maps or something. I know it sounds wacky to have a foldable phone, I was nervous about it too, but give it a look. It's actually really cool.