I've hand and machine stitched layers of supersoft felt in blues with contrasting embroidery silk, and backed it with some classy cotton and a wee button :) . All fastened securely with a 1" brooch back.
Approx 7cms across, looks great on any lapel, bag, hairband, cardi, wristy-cuff thingy.... you name it, it'll make it even more fabulous...