Cufflinks by Sophie Harley The size listed for these cufflinks is for each individual card. A chain links two of the cards together to create the cufflinks Features Primary Material : silver Other Materials : gold plated detail Fitting Type : chain Dimensions (mm) : 15x9x2.5 One of a Kind : No Metal : silver with gold plated detail Hallmarked : Yes Cleaning InstructionsPolish the silver parts with a silver polishing cloth from time to time to keep the silver shiny.