I don't know where the whole "between the nose and the chin" concept came from, but it seems like something concocted by rental shops so that they could just yank a board off the rack and make it work.
There's roughly 3 and half inches or so between my nose and my chin. That translates to roughly 9cm. There's a BIG difference between say a 154 and a 163.
"People say that marijuana smoking is going to get in the way of my career. I say to them that on the contrary, my fighting career is getting in the way of my marijuana smoking." -Nick Diaz