Buffalo Nickel Large Coat Buttons Metal 19mm 3/4" 6 Piece Set High Quality Solid Metal Concho Buttons, slightly domed Intricately detailed "3-D" Classic Buffalo Nickel Design (feels like a carving) Diameter 19MM (or 3/4 inches), slightly larger than a dime. Black wipe-off, Antique Nickel Finish Shank on back for attachment.