YARDSTICK
yardstick, yard measure
(noun) a ruler or tape that is three feet long
yardstick
(noun) a measure or standard used for comparison; “on what kind of yardstick is he basing his judgment?”
Source: WordNet® 3.1
Etymology
Noun
yardstick (plural yardsticks)
A measuring rod thirty-six inches (one yard) long.
(figuratively) A standard to which other measurements or comparisons are judged.
Source: Wiktionary
Yard"stick`, n.
Definition: A stick three feet, or a yard, in length, used as a measure of
cloth, etc.
Source: Webster’s Unabridged Dictionary 1913 Edition