Question about iPhone 12 mini - 317142

You can look at them directly on the apple site. The 5/5s has the same dimensions as the SE 1st generation:
www.apple.com/de/iphone/compare/?device1=iphone12mini&device...

Yes, take a look at this page, here you can compare most phones in size in various views, simply search for the models and display them (several are also possible).
phonesized.com/de/

Now that you have the whole screen at your disposal, you have to stretch your fingers a bit. But even on the iPhone 12 mini, you can "pull down" the screen by gesturing at the bottom of the screen (one-handed mode).
The 12 mini is also slightly larger than the iPhone SE (2016) and a little less tall and wide than the iPhone SE (2020).

Here is the link to the direct size comparison: j.mp/35mGcyq