This is a set of two plates purchased in December of the year before last at a Sugahara store. I no longer have the box, so I don't know the product number, but I remember they were around 3500 yen each. I've used them once, but they appear to be in good condition with no visible scratches or stains. They have a fine pattern, and I was told that small scratches are less noticeable than on regular glass. The size is about 18cm by 18cm. I look forward to your purchase!