Biagio d'Antonio, ‘Portrait of a Boy’, ca. 1476/1480, National Gallery of Art, Washington, D.C.
overall: 41.9 x 35.9 cm (16 1/2 x 14 1/8 in.)  framed: 57.5 x 52.1 x 6.2 cm (22 5/8 x 20 1/2 x 2 7/16 in.)