Diameter: Approximately 10.5cm England Mappin & Webb Silver Plate on Copper Wine bottle coaster I've heard that items "on copper" are more valuable than others. I lightly polished it for the listing, but the blackening on the inside surface didn't come off. I think it can be removed a bit more with a thorough polishing. Also, a part of the pattern on the inside surface, perhaps the copper base, appears faintly reddish depending on the angle. There are small scratches as it is a used item, but there are no major damages or deformations. As I didn't have any wine, I took a picture with a 4-go bottle of sake on it. Please use it as a reference. It's not just a bottle coaster; it's also lovely for serving snacks or as an accessory tray. Please refrain from price negotiations.