7x9mm Petite Sapphire Birthstone interchangeable bead. Great for September birthdays! All of our petite interchangeable beads have a smaller, 3.0mm diameter, hole and were specially designed to fit perfectly on our petite interchangeable bracelets, necklaces and earrings. Mix and match, it's easy and fun to create your own designs. High quality rhodium plating. Lead free and nickel free.