Wiki's entry on the furlong/firkin/fortnight system mentions the urs faq, in ref10.
So, although this isn't the relevant bit, I thought I'd re-post it:
Atomic physics has a unit called the "barn", equal to 10^-28m^2, and a Hubble is 10^9 light years, so a Hubble-barn is about 1 and 2/3 pints,or just less than one of those new-fangled litre thingies,
which means that drinking a couple of brown ales is like emptying a
bottle the length of the universe with the cross-sectional area of a
medium-sized nucleus. And you thought it was a long way to the Gents.
The fact that a gallon milk jug has the same volume as a straw with the
area of a medium sized nucleus such as Silicon that reaches to the end
of the universe is one way to visualize just how small and how big those two numbers really are.