What is the normal length of a clitoris?

Dr Susan Bewley obstetrician and gynaecologist gives Woman’s Hour’s Jane Garvey the long and short of it, and reveals the growing struggle to convince women that their genitalia are perfectly normal against increasing pressure for surgical ‘perfection’.
http://www.bbc.co.uk/programmes/b01l7sfc #FemaleGenitalia #surgery #WomanSHour #Clitoris