Sizes 9, 10, 11, and 12 are available.
This is just awesome and I'm seriously tempted to buy it, but they do not have my size(8) in stock and the band looks pretty thick which does not look good against my really small fingers.
"The Gear Ring is made from high quality matte stainless steel. It features six micro-precision gears that turn in unison when the outer rims are spun (as can be seen in the video). It is currently available for purchase in four standard US ring sizes: 9, 10, 11, and 12.
If your size is not currently available, please contact us and we will do our best to get your size in stock."