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JanaL161
6 months ago

— wrong

Ten and a half (10.5) inches: https://de.wikipedia.org/wiki/inch_(unit)
~26.7 cm

See the answer of

pchem
6 months ago
Reply to  JanaL161

The customs unit is the two-stroke ’. This is the three-stroke ’’’.

JanaL161
6 months ago
Reply to  pchem

Thanks for the note, I didn’t recognize it!

pchem
6 months ago

The three-stroke ’’ is the unit of the Paris line. A Parisian line corresponds to a length of 2.256 mm. 10 1⁄2 ’’ thus correspond to 23,688 mm.