Why do planes have such small?
From an engineering point of view, windows are a design flaw! The perfect fuselage, for safety, would be a continuous structure with no gaps, no different materials. Given that due to passenger expectations, designers have to include this necessary evil, they keep the ‘breaks’ in the fuselage as small as possible.
Well is all relative, a large commercial airliner will seem to have small windows but is enough for you to look out which won’t be much anyway at the speed and altitudes they fly and they can’t be too big b/c of presurization.. A small plane like a Cessna has very large windows in comparison, they fly lower and slower, and there are planes with really large windows like the Twin Otter and helicopters that give sightseing tours.