This set of 3 vintage plastic/glass buttons by Famous Buttons are clear plastic with a large faceted cut glass rhinestone in the middle. They are 15mm or 5/8" wide and 3/4" deep or 10mm deep. They are shank type and held together with a piece of wire in the back. My inlaws had a general store until 1965 so I know these are at least 55 years old. Check out my other items.. I will happily combine purchases paid together within a 7 day period. 5% Goods and Service Sales tax is required within Canada.