With mobile phones, it seems like a few inches bigger is just a few inches bigger. It seems like 4.3-inches is just a little bigger than 3.5-inches, and that 7-inches is just twice the size of 3.5-inches. But since measurements are based on the diagonal length of two opposite edges of the screen, the small differences are bigger than you might think.
Nokia N8 (3.5"), HTC Desire HD (4.3") and Samsung Galaxy Tab (7")
