The large button on the left came to me in my Grandmother's button jar. Just the one. It is 1 3/4" in diameter and made of plastic. I didn't really have a use for the single button, but I love the pattern in the middle, and I really thought it would make cute smaller buttons.
I imprinted it into a piece of clay, bisque fired it...
...and now I have a stamp to make new, smaller buttons.
The pattern isn't nearly as crisp as the original button once they are glazed, but they kind of look worn and like they have a history to share.
With shrinkage (for the stamp and for the buttons themselves), there is a significant size difference. The center went from 7/8" to 11/16".