Inspired by racing cars, this genuine black carbon fiber material is notorious for it's strength, lightness and lasting qualities. Layered with a clear enamel film to highlight the patterns and textures of the fibers and finished in our classic round rhodium plated base metal case. Material: Rhodium plated base metal with black carbon fiber elements. Size: The face of each cufflink measures 16mm length x 16mm height x 5mm width. The face of each shirt stud measures 9.8mm length x 9.8mm height x 3.2mm width.