Usage count is unknown, but it's likely low. It has been stored in a storage room for a long time, and there is rust on the metal parts. This rust can be removed by wiping it with an acid such as vinegar. There are fine scratches on the back. Height: 9cm on the outside Diameter: Approximately 33cm on the inside This is the middle size of a 3-piece sushi oke set often seen in online shopping. It's a guide for 3-4 cups of rice, suitable for 3-4 people. Please understand that this is a used item. Due to the high shipping cost, I cannot offer a discount. Thank you for looking.