The cubit is, among others, a unit used in the Bible for measuring the size of Noah's Ark and of the Ark of the Covenant. Cubits of various lengths were used in Antiquity by various peoples, not only the Hebrews. One cubit is originally the length from someone's elbow to the tip of their middle finger; it usually translates to approximately half a metre ±10%, with an ancient Roman cubit being as long as 120 cm.