ABS plastic (Acrylonitrile Butadiene Styrene) is strong and tough and lends itself well to metal plating. As a plastic  button, it is lighter in weight than its metal equivalent, ideal for fine fabrics. The face of this button has a central daisy pattern, surrounded by half daisies and scrolls around the edge.
 
11.5mm diameter, 2 hole sew through button.
Gold plated.