12 Gauge Jewelry Wire is fairly heavy. This is a popular size for making bangle bracelets and other wire bracelets. It's stiff enough that you'll want good-quality jewelry tools when working with it, but it's not too hard to shape. For soft wire such as copper, you may need to work-harden the wire to make sure bracelets and rings don't bend out of shape. Sometimes the process of forming your jewelry into the proper shape, work-hardens it enough. For other designs you may need to hammer-texture them or use a wire whacker on your finished design.