Generic Metal Black D Ring Buckle 1.25" Inside Diameter Loop Ring for Strap Keeper Pack of 20 D ring inside diameter:1.25" and inside radius :0.7" .Wire diameter:0.16 inches. Material:matal. It is suitable for 1.1"-1.25" width strap. Made of metal material. This D buckle is both component and ornament for shoes, handbags or backpacks