This is a wooden material that my mother purchased about 10 years ago for Kamakura carving. There are carving marks on one side, and a preliminary sketch remains on the other. The sketch is drawn in pencil, so it can be erased, but there is a rectangle in the middle that appears to have been drawn with a red ballpoint pen, and this does not seem to be erasable with an eraser. Please understand the above before purchasing. The approximate size is 30.4 x 30 x 2.2cm (thickness).