1,size of the chalk notebook:30*20cm. 2,function:written with chalk. 3,inprint:any ... CM)SN-184200232145*31*64 Features:1,which is chalk notebook,basic material is special 250g whiteboard paper.2,any color ... by children,then wriped off for using again continuously.6,A4 size is common,but different sizes available on request.7 ... reputation and a sound scientific quality management system. chalk notebook