We are less than a couple of weeks away from this year’s WWDC event in San Francisco, and while it is believed that we won’t see the next version of the iPhone, it hasn’t stopped an almost daily bombardment of supposed parts for the device appearing, and today we have news of an iPhone 5 design sheet that shows possible features.

An article over at MacRumors has what is being claimed to be a design schematic via repair company iLab Factory, which is allegedly showing a front panel for the new iPhone. This schematic matches closely with component images leaked recently that show a taller display, and the FaceTime camera being moved to the centre above the earpiece.

Many of the details on the schematic have been blurred out, but another source, Cydia Blog, has come up with more important features on the panel. The ‘active area mask’ that corresponds to where the handsets display will be fixed measures 3.55-inches high and 2.02-inches wide. The opening measures around 4.08-inches across but the handsets viewable display has historically measured slightly smaller than the actual opening.

The part would seemingly be able to accommodate a screen that measured 4-inches diagonally across with an aspect ratio of almost 16:9, which falls in line with previous rumours about the iPhone 5 screen size with a display that is the same width of the current device. It doesn’t show the exact total height for the part, but using calculations based on pixel counts and the known display height, hint that the overall height of the component is around 122mm.

This is around 7mm taller than the overall height of the iPhone 4S, and the recent leaked images suggest the new design will be similar to the iPhone 4S with metal edges, which extend out further than the front panel. The final dimensions of the next version of the iPhone would be slightly larger than this part.

As with any new iPhone rumour we have to take them with a pinch of salt, but evidence is seemingly growing that iPhone fans will be treated to a slightly larger display. Many have suggested that an increase to 4-inches would be the ideal size for an iPhone, and it would mean that app developers wouldn’t need to do much to get their applications running correctly on the new device.