Our copper handwriting keychain is appx 1 inch square, and is attached to a keyring that swivels around. The tag is reversible so a signature or drawing can be placed on each side. The edges are hammered and the copper is brushed. Over time, the copper will darken like an old penny; that's a natural tendency of copper and we love that patina! We do send polishing pads with each order, if you'd like to keep your keychain shiny instead.
This style works great as a zipper pull, also.