This mechanical, articulating necklace depicts the Earth, Sun, and Moon, and how these celestial bodies influence the ocean tides. Great for Oceanographers, sailors, beachcombers, and anyone fascinated by the wonderful workings our solar system and our home planet! Cast in pewter Comes with an adjustable length 2mm black leather necklace cord Dimensions: 5.1 cm high (Moon opposite Sun) 4.5 cm high (Moon adjacent to Sun) x 2.1 cm wide x 1.2 cm deep Weight 24 grams