Firstly, there will be a 4 inch budget iPhone. In this dummy phone example, it is a red variant and looks particularly like a iPod Touch. Previously, news claims that these iPhones will make use of Polycarbonate plastic material for its body. Even though the budget iPhone size is still 4 inch screen, it will have a thinner screen bezel and make the phone look seemingly smaller than iPhone 5.
Alternatively, there will be a 4.5 inch model (or even possibly iPhone 6). It looks a bit larger than a iPhone 5 and also will have a thinner screen bezel. It seems that the rumoured phone has a curved edge. It will be manufactured with similar material as the iPhone 5 for the body.
It is reported that these photos are leaked from iCulture, by designer Martin Hajek. Previously, he had designed the actual iPhone 5 design concept models which was leaked 3 months before the eventual launch of iPhone 5.