Metal D Rings for Belts Bags Lanyard Leathercraft DIY Craft Projects. Inside Width: 5/8" (16mm), 3/4" (20 mm) & 1" (25 mm) Please select your wanted size & color. For other sizes pls see CRAFTMEMORE storefront! See next picture for dimension of your selected sizes. Wire Thickness: 2mm for size 5/8", 3 mm for size 3/4" & 1" Package Quantity : Pls select 20 or 100 pieces D Rings for Belts Bags Lanyard Leathercraft DIY Craft Projects.