Balance Lab Easy Writing Board M - Study Desk for Eyes This product is size M. There is a dent in the rubber part, but it was present from the time of purchase and does not affect use. (Photos 3 and 4) The following is an explanation from the official shop: ※ There are marks from the injection of urethane (one place on the bottom of the back) and exit marks of the urethane (three places on the top of the back) on the edge of the back of the top board during the urethane integral molding process, but there is no problem with the quality, so please use it with confidence. I think it is clean with no noticeable stains or scratches. It is useful for homework, drawing pictures, etc. Please check the photos for the size and usage image. Immediate purchase is OK. Thank you for viewing. Please feel free to comment if you have any questions!