According to sources who spoke with 9to5Mac, the incoming iPhone SE will not be a smaller iPhone 6 — at least aesthetically.
It seems there will be some holdovers from both the iPhone 5s and 6 in the SE, though. The overall dimensions are said to be the same as the iPhone 5s, but the curved edges won’t be shiny.
The cover glass may be rounded at the edges, but it seems the curvature is so slight it’s indistinguishable. Other components of the SE’s hardware — like the headphone jack, power button and volume buttons — will be just as you find them on the iPhone 5s.