These necklaces are based on the Na'vi from the world of Avatar. The cords are waxed cotton, and the beads are an eclectic style combination based on different themes. Glass and semi-precious beads are used to highten the quality of the products. Each neclace is a different length. The Eywa themed necklace is 19 inches long, the Classic Blue Na'vi themed necklace is 16.5 inches long, the Colorful Na'vi necklace is 16 inches long, and the Forest and Cystal necklaces are 17 inches.