The most unusual units of measurement used historically or regionally

The roll, an obsolete UK unit, was used to measure butter and cheese, equivalent to 24 ounces or 680 grams.

King Edward II in 1324 defined an inch as three barley grains, a standard for small measurements.

The smoot, named after MIT student Oliver Smoot, measured the Harvard Bridge at 364.4 smoots, plus or minus one ear.

The morgen, meaning ‘morning’ in German, varied from 0.5 to 2.5 acres, depending on regional terrain.

The corgee, an obsolete unit in Karnataka, measured rice bundles, equivalent to 212 moodahs, a non-standardized mass.

The cana, used in Catalonia, was a length unit roughly equivalent to the vara, about 1.5–2 meters, for measuring fields.

A cow’s grass was the amount of land that could produce enough grass to support one cow, varying regionally.

The barleycorn, defined as the length of a barley grain, remains in use for UK shoe sizes, where one size equals one barleycorn.

The batman, a unit of mass from ancient Babylon, was used in trade into the Middle Ages, equivalent to roughly 7.7 kg or 16.7 lbs.

Tibetan nomads measured distances by the number of cups of tea consumed during a journey, reflecting the cultural significance of tea breaks.