wedding rings › Jewelry34.Sterling Silver 4 mm (less than 3/16) Wedding Band / Thumb Ring $7.95  (23)› Show only Sabrina Silver items The Half Round Dome Shape of this Ring Is the Most Popular shape in Wedding Bands. Because of manufacturing difficulties in making this kind of Wedding Band, this is only found in finer stores. This Ring is little under 3/16 (4.0 mm) wide, and has a Very Nice Solid Feel to it. And because it's all hand polished (no plating), sizing and engraving of this ring is no problem ©. Dome-shaped, about 3/16 (4mm) Thick High Polished Finish Solid Feel, Not Flimsy Made of Sterling Silver 925 Sterling Silver 4 mm (less than 3/16) Wedding Band / Thumb Ring wedding bands, wedding ring sets.