2.78mm wide back shank (most narrow area of the band). Photos have been enlarged to show detail.
We are more than willing to help you with any problems or answer any questions you may have. The item "14k yellow gold. 09ct SI1 H diamond created emerald ring 4.6g estate vintage" is in sale since Saturday, October 7, 2017.This item is in the category "Jewelry & Watches\Fine Jewelry\Fine Rings\Gemstone". The seller is "finerdiamond" and is located in Cincinnati, Ohio. This item can be shipped worldwide.