Galaxy S III picture points towards a 4.8-inch display

They reached upon this conclusion after they received the picture above with the phone set against a ruler. The length of the phone seems to be somewhere around 130mm, which makes it about as long as the Galaxy Nexus. The display itself seems to be a bit above 100mm. If you do the math it turns out to be around 4.8-inch diagonally, which is slightly greater than the 4.65-inch figure that was being floated around.
There is not much else to see except the presence of what looks like a physical Home button below the display. The constant appearance of this button keeps confusing us as we have already seen the phone having software keys within the display, as on the Galaxy Nexus. Then again, this is just a prototype device and the final device might not have this button at all.

Samsung is due to launch its Next Galaxy device at an event on May 3. We'll be at the event, reporting live, so make sure you come back then.