Cufflinks by Gail Klevan Available in 15mm and 25mm diameter discs - please select which size you would like from the finish drop-down menu. Please note the the 25mm cufflinks have no edging. Features Primary Material : acrylic Other Materials : silver plate Fitting Type : hinged bar Dimensions (mm) : 15x4 One of a Kind : Yes Hallmarked : No Cleaning InstructionsCertain substances, including perfume, insect repellent, hair spray, hand creams, sun-tan lotions, foundation creams or any other substances containing solvents, as well as natural oils in skin can damage the acrylic. In case of contact, wash off with soap and water and dry well. Do not expose to strong light (especially red coloured pieces). When not being worn put each piece in its own bag to minimise scratching.