Antique brass plated metal stamping blanks by TierraCast. Each 12mm circular charm blank measures approximately 17x12mm, including the loop. Made in the USA. Slightly domed on both sides with a plating designed to withstand metal stamping! These high-quality stamping blanks work great for making personalized custom jewelry. When stamping, make sure to hang the loop off the edge of your block in order to maintain a stable surface. TierraCast stock number 94-2401-27. TierraCast Safety Compliance Info.