Barleycorns to Millimeters
Named after a grain of barley, this unit is one third of an inch. It is why British and American shoe sizes step up by about 8.47 mm each time.
Common values
Formula
mm = barleycorn × 8.4666666667
Adult sizing starts at twelve barleycorns (four inches) and adds one per size. Size 8 refers to the last, not the length of your foot.
Frequently asked questions
Q. How many mm is 1 barleycorn?
1 barleycorn is 8.4667 mm, and 10 barleycorn is 84.6667 mm. Type any value in the box above to convert instantly.
Q. And how many barleycorn is 1 mm?
1 mm is 0.1181 barleycorn. This converter works both ways, so typing in the right box updates the left one.
Q. Where is this unit used?
Adult sizing starts at twelve barleycorns (four inches) and adds one per size. Size 8 refers to the last, not the length of your foot.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.