What is Sobriety coin?

A sobriety coin is a token given to Alcoholics Anonymous or other 12-step group members representing the amount of time the member has remained sober. It is traditionally a medallion the size of a poker chip, 34 mm or 39 mm in diameter, marking the sobriety time achieved, awarded for abstaining from alcohol while with the program. In other 12-step programs it is to mark time abstaining from whatever the recipient is staying away from. There is no official AA medallion or chip; they are used in AA culture but not officially Conference-approved, and the AA logo has not been granted for use on medallions.