The photo came by way of Sonny Dickson, whose leaks have been on the money more than once in the past.
The iPhone 6 model in these photos by no means shows the final design, but since it was probably created for case-makers to use for reference, its shape and size may prove accurate.
Curve test dummy
The yellow ring around the iPhone 6 dummy's home button is certainly not final, though it could be a stand-in for a light down there, which would be a new addition.
Interesting too that the new iPhone might wind up more similar to the original iPhone than the iPhone 5S.
All that said, the most important question is obvious: what the hell is the iPhone 6 model resting on in these photos?
Unfortunately Apple probably won't address that one in September, when we expect the iPhone 6 to launch.