Sheets are often sold by gauge (smaller number = thicker metal).

Options may include cold-rolled, hot-rolled, or polished.

Common types include 110 (purest), 122 (phosphorus deoxidized for welding/plumbing), and 145 (tellurium bearing for machining).

Provident Metals and SD Bullion offer copper rounds and bars.

Buying copper online involves navigating specialized metal suppliers, industrial suppliers, and precious metal bullion dealers, depending on whether you need raw material for fabrication or investment-grade copper. Popular Types of Copper Available Online

Etsy for smaller quantities or raw materials, and specialized hobby sites for modeling supplies. Factors to Consider When Buying