If you ask me, it's a good job the palms of people's hands are generally so compact, otherwise what would manufacturers describe their tiny products as fitting into? "Fits into your small-intestine" just doesn't have the same 'buy me!' ring to it. Anyway, Canon is latest to roll out that old chestnut, claiming their Selphy CP740 photo printer is, yes, small enough to fit in your hand. It'll spit out a fresh 4x6 in 58 seconds.