Men’s Koi Fish Ring with Blue Stone — .925 Sterling Silver Signet Ring Sizes (US Size):Ring Size 12.5 check the harmonica pendant version check the harmonica pendant version while the polished ridges stay smooth across the face different color — the koi fish ring with red stone swaps the blue for a ruby red CZ at the same 10 gram weight and face size 925 Sterling Silver Hallmarked + "TREASURE HEART 925" bezel engraving confirms authenticity Sapphire Blue CZ Navy to teal color shift depending on lighting — smooth cabochon dome 10 Grams Comfortable for daily wear — stays put without spinning 17mm x 16mm Face Signet scale presence — visible koi and stone detail from arm's length Bezel Set Stone Metal surrounds the stone on all sides — secure hold