The Simplex has been one of our biggest sellers. I think it's because of the simple lines on this uni-directional ring. The light certainly plays well off this design. Each one is produced through careful machining and hand contouring. Slip a Simplex on and it will be noticed. This ring is offered in standard sizes 7-13.5 in whole and half sizes. We do not offer 1/4 sizes at this time. If you don't know your size please visit a your local jeweler and get sized. This only takes a few minutes and most jewelers are happy to help you even if you don't buy from them. Please do not guess on your size so that you can start wearing your new ring right away. This ring is made to order and usually takes 2-3 weeks to ship.