Approximately 25x22mm round raw copper blanks with 1.6-1.8mm loop. 24 gauge (0.02"/0.508mm). 24-gauge soft metals are perfect for metal stamping, embossing, soldering, riveting, and engraving. These jewelry blanks are easy to customize with metal stamping tools, and are also popular to use for embossing, soldering, riveting, and engraving. Dimensions include loops. Loop measurements are inner diameter (ID).