Cesare Tallone (1853–1919) working on a portrait of Alessandro Pirovano in his studio, circa 1911.
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 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.
Tallone in his studio (lower-right) with his portrait of Lyda Borelli (in-progress), 1911.
Tallone, Lyda Borelli (detail).
Tallone, The Oyster Seller (1884-1885).
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).