The Chinese character '寸' is also used for the decimeter (dm) of International Unit System (SI), so, to make a distinction, the sun used in their traditional system of measurement is called 'shi cun,' and the sun in SI is called 'gong cun.'
また、国際単位系のデシメートル(dm)にも「寸」の字を宛てており、区別のため尺貫法（市制(単位系)）の寸を「市寸」、SI（公制）の寸を「公寸」と呼ぶ。