Need English Help with a metaphor or hyperbole

is this a metaphor or hyperbole: 

her hair was a mass of gray ringlets

Disclaimer: It is illegal to use the research material ordered on this website for other than research purposes. You must quote the sources appropriately. The company bears no responsibility for the use of research work, not intended for education use, the work is sold as-is with the highest quality and service available and written by freelancers.