Having a ruler on hand is a handy thing. I can’t think of the number of times I was in the home store and wish I had a tape measure on me. I do know that from the tip of my index finger to my knuckle is about 4 inches but it is hard to measure anything with any type of accuracy. This is where having something permaent with graduation marks on it would be handy. I would be thinking more along the lines of a thin ruler in my wallet or something but Greg Flanagan who is the director of operations at The Mill took it a step further. He got a ruler tattooed to his forearm so that measuring something is no longer a challenge no matter what you have in your pockets.