All signs point to Apple releasing a new 4-inch iPhone to replace the aging iPhone 5S. What will it look like? If a newly leaked image that's popped up online is authentic, it could look just like an iPhone 6S, but smaller, obviously.
One More Thing user Gijs Raggers posted an photo of what he claims is the unreleased 4-inch iPhone next to an iPhone 5. While you should be skeptical of any low-res images claiming to show unreleased Apple devices, Raggers has accurately leaked Apple products before, like the iPad Air in 2013.