New, unused mat board for framing. I purchased this from Sekaido about six months ago, but I'm selling it because I won't be using it. I opened the package and inspected it immediately after purchase, and it has been stored at home ever since. The surface is a smooth type of mat. Size: Sann size (606x455mm) Window size: (578x385mm) Color: White Thickness: Approximately 2mm Quantity: 8 sheets Hole position: Center I will pack it securely and ship it.