For an unusual and beautiful embellishment, try the Prima Junkyard Findings Heart Gear Metal Embellishments. Each of the nine pieces in the package looks like a gear but if you look closely, you'll notice that they feature hearts. Designed by Ingvild Bolme, these embellishments are made from metal and measure approximately .75" to 1.75".
Just used one of these metal heart gears on a card and already have it planned to use in a mixed-media project coming up. Like that there are a variety of sizes. Huge + to me. They are pretty and cute.