HUGE BIG BIG COIN SIZE is 3 1/8 inch WIDE one of the largest of the challenge coins I have seen in the collection. Navy Operational Support Center Chicago First Class Petty Officer’s Association. On the other side. Huge golden Octopus with sailors hat and all branches of the military. This special challenge coin looks great and almost like brand new. Failure to communicate and we will relist so please stay in touch with us. If you need more time to pay just let us know, its a non issue as long as you communicate, thank you.