What size is the Mona Lisa painting by Leonardo da Vinci?

It is 31x21 inches = 77x53 cm._____________
The recent thorough examination of Mona Lisa in 2004, documented in the book 'Mona Lisa, Inside the Painting' (Abrams) has revealed many fascinating new bits of data never before known or revealed. The exact size of the painting on a poplar wood panel is 79.4 cm by 53.4 cm by 1.4 cm thick in inches that is 31.25" x 21.02 x 0.55 thick.