The screen size would be the same as the 6, but with smaller bezels it could easily fit into the SE's form factor.

yeah, the 6 is 4.7", which it appears will be the size of the "SE2". this is apparently the smallest phone any major manufacturer is capable of making, even though just a few short years ago, 4" was the latest and there was enough demand for hundreds of millions to be manufactured. hrm...