The GORGEOUS purple, black striped shells measure approximately 20mm. The turquoise stones are 8mm and the onyx stones are 6mm in diameter. The necklace measures approximately 17 inches in length. Each strand is a different size. This piece can be worn twisted like a torsade or hung in separate layers. They are connected with a gorgeous, decorative hook and connector. The earrings measure approximately 2" long from the top of their sterling silver hooks. REMEMBER, FREE SHIPPING!