I purchased this about two or three years ago for around 20,000 yen. It's a unique chair with a seating experience like a balance ball x stool. I haven't used it much, so I don't think there are any noticeable stains. Please check the photos. Height: 54-64cm Seat diameter: 36cm Below is the product description from the store (TOKYO Interior) where I purchased it. Please refer to it. "UI-TIBOBO" stool, recommended for desk work and standing work. Actually, this stool is more functional than it looks!! When you sit, the stool tilts according to your body's movements like a balance ball, and the seat fits. The height is adjustable, and it can also support you during standing work if you lean on it while standing. The body rotates freely, making it easy to stand up and sit down. The fact that it's a backless stool type is also a plus, as it can be easily stored under a desk or counter and doesn't take up much space★