BELUGA is a tribute to the endangered Sturgeon as they near extinction. Hirotaka’s signature double line rings are renewed for the BELUGA in a sleek and sophisticated open center silhouette with a beautiful dimension. - Made in Japan.- 10K Yellow Gold.- Ring width 0.16 cm(approx.), Motif width 0.96 cm(approx.)- Diamond 0.09 ct (US size 4-7.5), Black Ruthenium Plated.- US Sizing. Ring Size Guide