The square centimetre is a unit of area in the International System of Units (SI) .
The abbreviation for square centimetre (or square centimetres) is “cm2”.
The square centimetre is a derived (or compound) unit in SI. One square centimetre is any area equivalent to the area formed by a 1 cm by 1 cm square.
One square centimetre is approximately the area of a fingernail.