This round omega chain necklace is made of fine sterling silver, plated with rhodium, and stamped with a "925" quality mark. This necklace measures 18 inch in length and 1mm (18 gauge) in width, secured with a lobster claw clasp, weighs 4 gram. This necklace is nickel free and hypoallergenic. Brand: BERRICLE Design: Novelty Style: Chains Occasion: Valentine's Day Resizable: No Adjustable: No Metal Stamp: .925 Sterling Silver Gift Box: Gift Box