Bonnet Flash from Tartan Swatch?

[Bugbear]

Any ideas?

* Picture removed. *

I have a swatch of my tartan fabric that I would like to use, in combination with a lapel pin, as a bonnet flash, and possibly still as a lapel pin sometimes. The swatch has a usable rectangular part that measures four inches by two and a half inches. The pin is one inch by a half inch. In the picture, a piece of the "L" shaped swatch is folded back behind the usable part.

I have been given measurements for a bonnet flash in another thread, but I would like to see what others think.
And thanks to DWFII for providing those measurements of his bonnet flash for reference.