These unique Sterling Abacus Cufflinks are actually standard representations on an early effective abacus carefully crafted of fine sterling silver. Abacus Cuff Links is straight whale backing. The cufflinks are actual working abacus so in case you left your calculator at home you still have a helpful apparatus for those arithmetic problems. Ideal for any occasion needing a colorful shirt and an attitude to match and can also be given as a gift for a birthday, Father’s day, going away party, graduations and such or just to show someone you’re thinking of them. Cufflink size: 3/4"W x 5/8"H