||GEM-QUALITY OPAL! Solid 925 sterling silver ring. Ring size: US size 8 / GB size P½ / Swiss size 17 / inside diameter 18.1 mm / inside circumference 57.0 mm. The stone is not yet set so that this ring can be resized for CHF 20. If you need resizing please contact us by e-mail prior to ordering so we can send you an adjusted invoice.