Agnolo di Domenico del Mazziere or Donnino di Domenico del Mazziere, ‘Portrait of a Youth’, ca. 1495/1500, National Gallery of Art, Washington, D.C.
painted surface: 51.5 x 34 cm (20 1/4 x 13 3/8 in.)  overall: 52.5 x 35 cm (20 11/16 x 13 3/4 in.)  framed: 73.7 x 56.5 x 6.4 cm (29 x 22 1/4 x 2 1/2 in.)