Writeon- slate is HDHMR board with Writeonwalls-writable paint. Color side can be used to write with a whiteboard marker pen and the other side can be used to write with chalk or whiteboard marker pens. It's perfect product for kids at home, Desk writing pad in office. It can be used in home/office/school/kitchen/restaurants. The size of board is 292mm x 292 mm & 5.5 mm thickness.