Exactly what I wanted. I have a 30-inch black onyx necklace with graduated-sized beads. The earrings are exactly as described. I just didn't know what 8mm looked like, and I guess I was hoping more for a 10 or 12. Still, they are a perfect match for my necklace, and I am glad I found them. BTW, my black onyx goes with so many outfits: just the perfect little pop.