Tiffany & Co. Sterling Elsa Peretti Small Open Heart Necklace 16". Weight: 3.5 grams. Size: 16" long, small pendant is approx 16mm wide. Hallmarks: Tiffany & Co. Elsa Peretti Spain 925. Condition: Pre-owned, minor signs of wear. Tiffany pouch and box included. Size: Small Sterling silver 16mm wide On a 16" sterling chain Perhaps Peretti’s most famous design for Tiffany is the “Open Heart,” reportedly inspired by the void within a Henry Moore sculpture. It features clean, simple lines and a sophisticated, curvilinear shape that celebrates the spirit of love yet is void of sentimentality.