These cufflinks are actual buffalo nickel coins that were struck by the United States Mint from 1913 to 1938 and have been intricately hand-cut with a jeweler's saw. They are the perfect unique gift for a stylish man to wear on his french cuff shirts. You know the measurements of these cufflinks already...nickel-sized! Each pair has sterling silver cufflink findings soldered onto the buffalo nickel. The backings are strong, hinged findings that will not pull through your cuffs.