Unfortunately I don't know the size but guessing 9 or 10, and only guessing it's carbon from Google lens description
Black Carbon Fiber Mens Thumb Ring Wedding Bands Promise Ring for Mens Women
King Will GENTLEMAN 7MM Mens Titanium Ring Black Carbon Fiber Inlay Comfort Fit Polished Wedding Band (8)
King Will GENTLEMAN 7MM Mens Titanium Ring Black Carbon Fiber Inlay Comfort Fit Polished Wedding Band (13)
King Will GENTLEMAN 7MM Mens Titanium Ring Black Carbon Fiber Inlay Comfort Fit Polished Wedding Band (10.5)
King Will GENTLEMAN 7MM Mens Titanium Ring Black Carbon Fiber Inlay Comfort Fit Polished Wedding Band (9.5)
King Will GENTLEMAN 7MM Mens Titanium Ring Black Carbon Fiber Inlay Comfort Fit Polished Wedding Band (10)
