Mens Sterling Silver Rectangle Signet Ring

This item was made by genuine 925 sterling silver, high polish finish the rectangle face size is approx 12 mm by 14 mm. What standard are those ring sizes listed above? 1. All our store ring sizes were in US standard. 2. If you don't know your US size, kindly refer to"Ring Size Table"page. Or just tell us your ring size inside diameter or inside circumference.