Runner's Necklace,13.1 half marathon or triathalon. The bar charm is handstamped and is one and a quarter inch in length and one quarter inch wide, made of non tarnish aluminum. I stamp either 13.1 or 26.2 on the charm. It comes on an approximately 18 inch stainless steel chain (does not tarnish) with a secure lobster claw clasp. A great gift! Because this item is handstamped, expect some slight variation in the lettering, but that is to be expected and is what makes it charming. Handmade in America