Stunning Infinity Eternity Black and Silver Sparkle Color NA Medallion with the Infinity symbol in the center. Size is 1 5/16" or 34x2mm This is an Official Narcotics Anonymous Medallion featuring raised 3D Graphics and Text back of the coin is black color. If it doesn't say NA on the back its not official. Excellent sobriety gift item for honoring Members of Narcotics Anonymous who have passed away