Kneeling Woman with her Left Arm Raised, Raphael (Raffaello Santi)
On Google Art Project; also Wikimedia Commons. Original is in the National Galleries Scotland.
Red chalk with touches of black chalk. 11×7.5″ (28x19cm).
When I think of superb draftsmanship in the history of art, Raphael is way up there on the list. Way up there.