Overall, more than 352 million units of the Apple iPhone have been sold with 217,073,000 of them containing a 3.5 inch screen. The bottom line? Put all the displays together and you would have a structure wider than Central Park.
Perhaps this is why they call New York City the Big Apple.
If you put the display of every Apple iPhone ever sold together, you would create this structure which would tower over the Big Apple
source: CultofMac via RedmondPie