The cases were purported made by a third party company based on information from Foxconn, Apple's manufacturing partner.
The red case pictured in the middle gives us a good idea of the expected size of the iPhone 8 in comparison to the 4.7-inch iPhone 7s and the 5.5-inch iPhone 7s Plus. Despite its smaller size the iPhone 8 is believed to have a larger 5.8-inch display.
It's widely expected that the 10th anniversary iPhone will be a massive update. It will purportedly have a chassis made of reinforced glass with a stainless steel metal frame and an edge-to-edge display that has no bezels on the top and bottom. Additionally, the front camera, Touch ID, speaker, and other sensors will apparently be embedded into the display. Another report claims that the device would be a clear piece of glass with a next-generation OLED screen. The 5.8-inch screen is said to feature a main 5.15-inch display area with a reserved 'function area' below for virtual buttons. The device may use a stacked logic board design freeing up space for a larger battery pack. More recently, Apple is said to be equipping the phone with wireless charging, an iris scanner or face scanner, and a 3D camera.
There have conflicting reports on when we could see Apple's new iPhone launch with some predicting a later October or November release. We'll likely see many more leaks as production of the iPhone 8 gets underway. Please follow iClarified on Twitter, Facebook, Google+, or RSS for updates.