Inches, foot and yard are interesting
Edward 1st was regulating measurements.
On your fingers the first section, from knuckle to the first joint, was called a hinch. Eddy ruled that the hinch of his finger was the standard measurement to be used. And 12 hinches was the length of his foot, thus it was the be the standard. To be used during his lifetime. The h was soon dropped as it was a nearly silent letter. You'll find your hinch more or less equal to 1 inch
btw when the French used inches, their inch was about 1.25 inches, longer. So when they say Napoleon was short at 56 inches tall thats French inches which is actually 70 inches which is 5 ft 10, not short at all (proven)
You often see the medieval longbow arrow called cloth-yard shaft long. Edward 1st was constantly at war. When he took up using Welsh long bow archers he found there was great variation in the length of supplied arrows. The width of the standard weaving loom at the time worked out at 34 to 37 inches wide. In setting his standards the looms were to be 36 inches wide, thus it was ruled the supplied arrow shafts were to be no less than the width of a cloth loom. Commercial weavers worked together in a weaving yard. As usual everything got contracted and simplified
Next lesson will be . . . .