Oda halo ring in gold set with Emerald and Diamonds. Emerald: ~4.0 carats (12mm x 10mm oval) Diamond D-F VS+ grade: ~3.0 carats Crown dimensions: 20.3mm height x 18.3mm width x 8.5mm depth Band dimensions: 2.3mm width International ring size conversion chart . For custom size, specify details in the order notes. Blog: Organising Your Jewellery Box for Optimal Protection Blog: How Lab Grown Diamond Rings are Redefining Traditions