Unique convertible black pearl earrings that turn into a ring. Pearl size is 8.9mm. Sterling silver. Black pearl color is lighter in a silvery blue hue. Pearls are well matched, though have some natural imperfections. The imperfections are sort of hidden, due to how the pearls are mounted. Bough from a boutique in Hawaii, where this was designed and handmade. It's called a "surprise" ring. Ring can be adjusted as the jeweler adjusted it for me. I'm guessing it's probably about a size 6.