These copper sheets are 36 gauge/5 mil (.005 inches) thick and six inches wide by twelve inches long-this pack includes four sheets. They are manufactured to ASTM-B152 specifications, are annealed (soft and very malleable) with a smooth commercial finish, and are 99.9% pure copper Alloy 110 (Certificate of Conformance available upon request). These sheets can be used for various outdoor /garden projects. They can also be used for craft and art projects (embossing, repousse, scrap booking, paper crafts, punching, veneering etc...), do it yourself and construction projects, electrical applications including rf shielding, manufacturing, and much more! Basic Copper's superior packaging provides maximum protection during shipment. If you are unsure of which thickness is right for your project, check out our Thickness Guide. If you have any questions, please don't hesitate to contact us via phone at 252-491-2812, via email at info@basiccopper.com or through our "live chat" and we will be happy to discuss your project!