Any act of measuring; measurement. The earliest standard measurements appeared in the ancient Mediterranean cultures and were based on parts of the body, or on calculations of what man or beast could haul, or on the volume of containers or the area of fields in common use. The Egyptian cubit is generally recognized to have been the most widespread unit of linear measurement in the ancient world. It came into use around 3000 BC and was based on the length of the arm from the elbow to the extended finger tips. It was standardized by a royal master cubit of black granite, against which all cubit sticks in Egypt were regularly checked. One of the earliest known weight measures was the Babylonian mina, though the two surviving examples vary widely - 640 grams (about 1.4 pounds) and 978 grams (about 2.15 pounds).