Copper Sheet 10 Mil (.010 inches thick) 30 Gauge Alloy 110 (99.9% cu) Smooth Commercial Finish/Annealed (Dead Soft). Premium Copper Sheets for Crafts and Art Projects, Embossing, Manufacturing, Electrical Applications, Research and Development, Do It Yourself Projects, and Much More! Copper Sheets stocked in widths of 1", 3", 6", 12", 18", 24" and 36". See our Thickness Guide for help determining the proper thickness for your project. If you don't see the size you need or have any questions, please don't hesitate to contact us via phone at (252) 261-2677, email at or try our "live chat" feature for immediate assistance!