The earrings are made with sterling silver. The outside circle measures 11mm and has a brushed finish. The offset inner circle cutout measures 7.8 mm. The posts curl down the backside about 43mm from the top of the circle and become part of the overall design. I do make a slightly smaller version. (See listing http://www.etsy.com/view_listing.php?listing_id=27330055)
Photo 5. The last photo shows the other metals that I use to make the Potential Motion Earrings. copper, brass, or oxidized silver. Also, mokume gane at an additional cost. See this listing:
These earrings are MADE TO ORDER. See Shop Announcements for current turnaround time. There will be slight variations in where the posts come off the back. These earrings are intentionally assymmetrical, that is what gives the perception of motion.