This piece stands in the Museo Nazionale Palazzo Massimo, next to the Seated Bronze. It is life size at least, an amazing bronze sculpture.
After seeing the Caravaggio and His Times Exhibit in Rome last week I did some rough-ish drawings of some of his paintings in conte crayon. The man certainly could draw very well in the manner of his day. That did not make him unusual as an artist for that time. Rather it was his perfecting the dramatic use of lighting in his paintings.