I agree with those here saying that the iphone lineup just gets TOO big. And too complicated.
There was a time where there were small iPhones and there was NO choice, just storage options and colors. And the 5C. That was it. You could buy the iPhone or let it be if it was too big, too small, too light whatever. It was THE IPHONE.
Now this and that and something for everyone buy not really everyone. Why does Apple wants everyone to have an iPhone? It is all about profits these days, of course it was back then too but it had much more finesse and much more logic. Buy it or leave it. Apple was too "cool" to do it like all other companies. They had the image so they didn't need to make it complicated.
Of course nowadays Apple has gotten too big for its own good. So I agree with those shrinking the lineup.
If I would be boss I would have three normal iPhone size options as someone said here. 5inch, 6inch, 6.8-7inch. Mostly the same specs (which can be included in a small phone, otherwise the 5inch model needs a specs down). And a cheaper SE. That's it. No normal and Pro, no same size options with more and less specs. Three options. Small, middle, big. And a cheap iPhone. I wouldn't even sell a cheap iphone i think because most people nowadays can buy an expensive iPhone, even if it is on loan and debt (even so I would never do that, if you don't have the money you don't have the money). Then make each bigger size 200-250$ more expensive and here you go.
No one really needs the normal lineup. And you can make the device much lighter by getting rid of the stainless steel (pretty but heavy). But there is already a rumour for this years pro lineup regarding titan. Weight makes a big difference too in handling a device.
But 6.9inch and 6.3inch? The phones must get bigger then, the bezels aren't that big that there is room for 0.2 more inches to fit in. See size difference between 11 Pro Max and 12 Pro Max. 12PM is bigger even though bezels got smaller too.
I WILL STAY WITH MY IPHONE 13 MINI AND IPHONE SE 2016 TILL APPLE FINDS A WAY MAKING SMALLER DEVICES AGAIN (5.8 IS MAXIMUM FOR ME).