...Sykes called it "A graceful little goddess, the Spirit of Ecstasy, who has selected road travel as her supreme delight and alighted on the prow of a Rolls-Royce motor car to revel in the freshness of the air and the musical sound of her fluttering draperies."
Today's Spirit of Ecstasy stands at 3 inches and, for safety, is mounted on a spring-loaded mechanism designed to retract instantly into the radiator shell if struck from any direction. There is a button within the vehicle which can retract/extend the emblem when pressed. She can be made of highly polished stainless steel, sterling silver or 24-carat gold, the sterling silver and gold being optional extras.
Futher details about the ornament are available at Wikipedia and The Telegraph, via the New Shelton wet/dry (whence the photo).