Sand Dollar Button, Antique Silver Plate -17mm 2 Pieces The buttons measure OD: 17mm and the loop has an inside diameter of 2mm. Lead, Nickel & Cadmium Free Pewter that exceeds both the CPSC standard and the new California law regulating children's jewelry content. Sold by the pair (2 Buttons) Antiqued Silver Plated Made in the USA by TierraCast.