ADVANTUS-Tim Holtz Idea-ology: Cash Keys. A Cash Key is a decorative metal charm which can be adorned with monetary symbol stickers. Simply attach a decorative sticker onto the charm then cover with a clear epoxy sticker. Each charm measures 1x3/4 inch and has a small ring at the top for easy attachment. This package contains ten metal charms, twelve decorative stickers, and twelve epoxy stickers