Smooth round black Mother of Pearl with Sterling Silver wire wrap and Sterling Silver Rolo chain Mother of Pearl is 4mm Ring is a size 10 1/2 (see photo of ring on the metal mandrel). Flexible chain ring that gently rolls on your finger. Depending on the size of the bead, you will likely need 1/4 to 1/2 size larger than you typically wear. This ring will need to roll over your knuckle, but will be a little loose when on, however, it should not fall off when you shake your hand. Note: I am sorry, but there are no returns/exchanges on rings, so please make sure you know your size and account for the information above. Note: All pearls/stones may slightly vary in color, shape, and size because they are real/natural pearls/gemstones. Some pearls/stones may have been dyed or heated to enhance their color. All pictures are taken in natural light. Colors may vary slightly when viewed on different screens/devices.