Convert from button measure to yard

Unit Definition (button measure)
The button measure is a unit of distance equal to 1/40 inch (0.635 millimeter), used to measure the thickness of buttons.

Unit Definition (yard)
The yard is a fundamental unit of length in both the U.S. Customary System and the British Imperial System. Originally taken to be the average length of a stride, the yard is actually equal to 3 feet; defined as 91.44 centimeters.