The amount of rumours related to the new iPhone are increasing day by day, and the latest is regarding the SIM card for the next iteration of the iPhone. The next generation iPhone is rumoured to use a nano-SIM which is even smaller than the rather small micro-SIM in the iPhone 4S.
Apple has been trying to get the new SIM card standard accepted by other companies. The reason for Apple wanting to move to a smaller SIM card is so they can conserve space inside their devices to come. Space is a key element when manufacturing electronics and Apple want to save as much as they can to make room for new and emerging technologies.
The images of the new nano-SIM were released by Nowhereelse.fr and as you can see, the new SIM tray is not that much smaller than the previous one but every millimetre counts.