Notice that the painting is closer to the viewer than the model. The painting is in Sight-Size, but it is not life-size.
Cesare Tallone
by Darren R. Rousar
Cesare Tallone studied at the Brera Academy in Milan, between 1872 and 1880. He was most well known for his portraits and he had a working friendship with Antonio Mancini.
The standard book on Tallone, written by his granddaughter, is here (in Italian). She also maintains a website dedicated to the family, here (in Italian).