The Iron Strong Jewelry designed barbell necklace is made of solid sterling silver. The barbell pendant has a weighty feel to it. Barbell is 40mm long and 5mm thick at the widest point. Barbell comes on an 18 or 20″ sterling silver ball chain. 20″ is a common length for men. 16-18″ is common for women. Please indicate when ordering if you need 18 or 20″ Handmade in USA.