This Rings Size is partly made up by the size of the Pearls which are unique & vary. Because of this we give two ring sizes as a guide to what size our stock of these fall between. Also this Ring is not designed to be perfectly round. Fingers are not perfectly round either & it’s typical for rings to shape to your hands over time. These Rings go on sideways or upside down & then need to be turnedso that the pearl sits on top.