Sterling Silver Santo Nino De Atocha Pendant with an 18 Inch Link Necklace (I-1603) This 1mm necklace measures 18 inches. This pendant measures .5 inches from left to right, and 1 inch from top to bottom. This pendant and necklace weighs 2.52 grams. High Quality 925 Sterling Silver Jewelry! Ships from USA, Guaranteed!