Summarizing https://arxiv.org/pdf/2309.03272.pdf

Here's my try:

The authors propose a new cosmological model where the size of the universe is smaller than what has been observed so far. They argue that this idea fits well with swampland conjectures and comment on its relation to the dark dimension scenario. The authors also discuss the implications of their proposal for inflationary models and the no-boundary proposal in quantum field theory. In their model, the size of the universe is determined by the scale of inflation, which is assumed to be on the order of the currently observable scale. This means that the size of the universe is just a few times larger than the currently observable size, with a closed spatial geometry.

The authors argue that this idea fits well with swampland conjectures because it allows for a smaller size of the universe without violating any known laws of physics. They also comment on its relation to the dark dimension scenario, where the size of the universe is much larger than what has been observed so far.

The authors discuss the implications of their proposal for inflationary models and the no-boundary proposal in quantum field theory. Specifically, they show how their model can be consistent with both ideas, but also point out some potential issues that need to be addressed.