You can look at them directly on the apple site. The 5/5s has the same dimensions as the SE 1st generation:
https://www.apple.com/de...

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).
https://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: https://j.mp/35mGcyq