Check out these FR Pins. Great for hat and shirt accessories, or to deture the bird dog who's always watching for FR shirts. These pins are made from acrylic and have a rubber back stop. The size of the pin is 1"x.9" Each pin has a thin protective film over the front to protect from scratches.  You can peel this off.

Disclaimer: The pins are for decoration purposes only and will not protect you from flames.