These are very a large showy mesh chain cufflink.The gold plated mesh chain wrap around cufflinks hold a round 18mm amber faceted glass piece  in a gold plated round setting which measures 23mm across . Mesh wrap cufflinks were very popular in the 1960's and 70's and are usually very bold and showy. The point of the amber glass to the base of the cufflink is 14mm height. The width of the fine grade mesh chain is 14mm and the length of the mesh is 60mm. For a double cuff shirt the bottom of  the cufflink hole in the shirt needs to be no more that 2.5cm from the edge of the cuff so that the mesh can wrap under the cuff and around to be fixed to the back and held in place by the toggle.