You are looking at twenty miniature vintage round green glass buttons, domed paperweight style, set in a tiny metal toothed collar. They are 5/16" in diameter, the dome raised to 1/8" high. the backs are a silver colored metal with the shank for sewing as part of the metal back. they look like cat's eyes, glowing when the light hits them, and would be perfect for sew a St. Patrick's Day outfit your favorite doll, or a lady's pretty blouse. The tiny sizes are very popular and not as easy to find as they once were. Thank you for visiting.