WE DESIGNED THIS PIN TO DIPICT HOW A LOT OF US VIETNAM VETS HAVE WATCHED OUR NICE GREEN, YELLOW AND RED SERVICE RIBBON TURN INTO A BLACK AND ORANGE RIBBON. TOO MANY OF US HAVE SUCCUMBED TO THIS DEADLY ILLNESS THANKS TO THE GOVERNMENT...19 MILLION GALLONS OF DIOXIN WAS DROPPED ON SOUTH VIETNAM. It's a one inch pin...includes two clutch backs so it won't slide around.