one of the characters used to represent a musical note in gongche nota
Origin unclear. Possibly a pictograph of a side view of a person with a mark on their leg indicating the length of one foot.
《說文》：“尺，十寸也。人手卻十分動脈為寸口。十寸為尺。尺，所以指尺榘事也。从尸，从乙，乙所識也。周制寸、尺、咫、尋、常、仞諸度量，皆以人之體為法。”