Platinum 20 x 16mm Oval Signet Ring Classic Oval 16mm x 13mm 9 Carat White Gold Signet Ring Signet Circle Oval Signet Ring in Sterling Silver Classic Oval 20mm x 16mm Sterling Silver Signet Ring Signet Circle Oval Signet Ring Nicholas Wylde. Made to Order Delivery four weeks Our largest Oxford oval platinum signet ring is quite the showstopper and ideal for larger coats of arms or family mottos. It measures in at 20 x 16mm with a 3mm deep head, which is ideal for all types of engraving including deep seal. Signet rings make the perfect timeless gift, designed to be passed on through generations. You can personalise your ring with our hand engraving service our team can help you create a bespoke design. As all our signet rings are made to order, please allow four weeks for delivery. If engraving is required, itll take an extra two weeks for initials and an extra four weeks for seal engraving. Specifications: Metal: Platinum Shape: Oval Size: 20x16mm Depth: 3mm Related Product: Platinum 3. 06ct Tanzanite and Diamond Cluster Ring