This hard to find, vintage, crystal Iris and Herringbone depression glass 3 1/4 inch diameter drink coaster was made by Jeannette Glass from 1928 to 1932. This coaster measures 1/4 inch in depth on the inside. It is in very good condition with no chips or cracks. Be sure to search our other Iris available. We guarantee all items to be as described. THANK YOU.