In Engadget Japan version, we get the drawings that are "iPhone 6s" from a reliable source of China. Only overview and dimensions, but the thickness will be 7.1mm of the slight increase from 6.9mm of the iPhone 6.
It was previously rumored that the iPhone 6s will be slightly thicker to accommodate a new Force Touch feature for the display.
Other predictions for the iPhone 6s include a new NFC chip, 16GB of storage, a faster LTE chip, a Rose Gold color option, 7000 series aluminum, 12MP Camera, 4K Video Recording, 240fps Slow-Mo, and more.
Read More [via Antoine]