The nail I need is about this big...or maybe the spot is about this big...or maybe it was *this* close...
Now you can know exactly how big things are with the Finger Ruler. Either type in a measurement to show the distance on the screen, or slide your fingers on the screen to measure the distance between your fingers. Metric and English(Imperial) unit support.
With so many uses, you should be using it already. Try it today!