Hi, I made the calipers way back, and at the time I did not know about the offical size of Poser units. I set it up so that the P4 guy is six feet tall. I'm not sure how close that is to the offical scale, but hopefully not far off. If you want to use the calipers, then one inch would be 0.08333333 on the gauge, therfore 5 feet seven inches would be 5.5833333. Cheers Ian