I think it's of 2-dimension i.e Height and Width.

77 cm x 53 cm

The Mona Lisa or La Gioconda, French is a half-length painting portrait by the Italian Renaissance sculptor Leonardo da Vinci that has been characterized as "the famous known, the most inflicted, the most formulated about, the most composed about, the most imitated work of art in the world." The Mona Lisa is also one of the numerous priceless portraits in the world. It holds the Guinness World Record for the extraordinary known protection judgment in an account at US$100 million in 1962.