These are black onyx Swank cufflinks set on silvertone. They are in excellent working condition. The back of one has a little discoloration that does not affect them. The cufflinks are clearly marked Swank on the back. Each square cufflink measures 3/4" x 3/4". I've included at no extra charge two smaller versions with spring action backs. The smaller ones are 1/4" x 1/4".