A4-size grid design cutting mat, blue on the back. - Model Name: Kosaku Mat DNA - Size: A4 size - Surface: Grid design - Back: Blue - Uses: (Front) Cutting mat (Back) Clay board Used in lower elementary school. It combines a cutting mat and a clay board. There are no visible cuts from using blades. It was mainly used as a clay board. I am listing another of the same item. I will offer a small discount to those who purchase both. Please understand that this item has been stored at home, so please purchase only if you are okay with that. Thank you for looking.