My ex was a foreign exchange student at my high school who was raised on the metric system. I always told people I married her because she believed this was 12 inches.
I also used to tell people that if I needed to hide something from her I would just put it in the oven. The divorce probably shouldn't have come as a surprise.
I was a little over an inch off on that one...I was trying to use all the objects on the work bench for reference like others. When I first looked at it I thought that the 3's were going to be over 10" and more like 11" but that kept giving me a really high score for I what felt the frame was carrying. I came down to 10" for each and adjusted all the G measurements accordingly and arrived and 141 and 4/8"....and I felt that was about right. I also figure he was about 17" inside.