
I think this is great, since I have been measuring with body dimensions for years - using my own body to discretely measure an interesting space without drawing attention to myself by whipping out a tape measure, or helping a client to tell me how big is 'big' by stretching out both arms and saying, "This big?"
In 1793, Napoleon tried to create a standard, a metric system, with some success. And in 1824, the English made a standard yard, also with some success. The process took a good 50 years to take hold, and today we still have lots of regional variations, not to speak of the gulf between inches and centimeters.
Here in the States people measured cloth, grain, lumber using the system they had learned in the 'old country'. A Pennsylvania carpenter who repairs 18th century houses has told me he can tell a house built by a German from one built by a Quaker by its dimensioning.