UNIVERSITY OF OREGON DUCKS HELMET CHARM SLIDE PENDANT FOR NECKLACE EUROPEAN BRACELET DIY PROJECTS ETC Ribbed Slider has a 5mm Inner Diameter Core Oregon Charm Dimensions: 5/8" Across X 1/2" in Length Great Addition to a Necklace, Bracelet (Fits most name Brands), DIY Projects, Etc. Bright Enamel Color, Nickel and Lead Free SHIPS FAST FROM KANSAS USA!