This set of 3 vintage plastic buttons are what I would call royal purple. They are a rich blue with a hint of purple. They are 20mm or 3/4" wide with rounded outside edges and an indented square looking textured middle and about 1/4" thick. I have flipped one over to show 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.