Sterling silver 10.4mm x 25.8mm ear wire with 2mmround ball end. These ear wires are made of 20 gauge hard wire andare heavy enough to support most any materials you might use in yourearring designs. The 2mm round ball gives a little detail and adds tothe look of your earrings. The long back end of the ear wire gives anice secure locking system while you wear them. To top it all off and make your ear rings secure than ever, don't forget to use rubber ear nuts.