Report Abuse. 1  Mona Lisa Dimensions. 2  Mona Lisa Original. 3  This Site Might Help You.  20 7/8 by 1  30. the original dimensions of the mona lisa are 77 × 53 cm or 30 × 21 inches.  For the best answers, search on this site https://shorturl.im/ 1 axBvt. 77 x 2  53 cm. Image Dimensions: 23. 18 in.