Magic Metal Spike Ring Size 7 Silver Tone Knuckle Bar Stud Hardcore RH15 Vintage Punk Fashion Jewelry Ships from the USA Show your dangerous side with this line of knuckle spikes. Shiny polished silver and modern, streamlined band. Ring Size: 7. Each Spike Measures Just Under 1/2 inch. Makes a great gift. Search Magic Metal Jewelry for more jewelry styles.