Springfield Leather Company's Solid Brass Button Studs (12mm, Antique Brass/Solid Brass) Solid Brass Button Studs Sizes:(base x hight) 7mm x 5/16", 8mm x 5/16", 10mm x 3/8", and 12mm x 1/2" Colors: Antique Brass and Nickel Use on bags, bracelets, and anything else that needs a removable fastener! Package Quantity: 1 Button Stud (Screw & Stud)