Purchased from a Noguchi directly-managed store. I'm selling it because I don't have a chance to use it. Model Number: Matiere #126-M (NN126-M-YG) Size: Size 11 (Detailed size published by the manufacturer: width 4.3mm / thickness 1.3mm) Material: K14 Yellow Gold The color is skin-friendly and the design is simple, so it can be used both on and off. Although it's size 11, I was told by the store staff that free resizing is possible for sizes 13-18. The warranty card is not included because it has a personal name on it. It is included to prove that it is authentic.