Don't Wait for a Small Display
If you want a small screen, don't wait around for Samsung's next Galaxy S flagships.
Unless Samsung takes things in a completely different direction, you can expect the Galaxy S20 models to come with large displays.
It's clear that Samsung's interested in making screens bigger, not smaller. One Galaxy Note 10 model, the Galaxy Note 10+, features a 6.8-inch display.
Galaxy S20 rumors hint at three different screen sizes. The information comes from evleaks so it's extremely trustworthy.
If things hold up, it looks like the smallest Galaxy S20 variant will have a 6.4-inch display while the larger models will boast 6.7-inch and 6.9-inch displays.
You can get a pretty good look at the size of the three Galaxy S20 models, and how they compare to each other, in this image right here.
If you want something smaller you're going to want to look elsewhere. Fortunately, there are a bunch of excellent small screen Android phones available right now.