We are hard cover book supplier in mumbai india, school notebooks size: a4, a5, 16.5 x 21.5cm,16 x 21cm, 16 x 22cm, 17 x 22cm,...or requested. Cover material: 128157180gsm...art paper; 190210230250300 gsm....white(ivory) cardboard,grey cardboard,coated duplex board with greyback;craft paper or other special paper available. Cover printing : 4 colors-cmyk printing custom notebook binding: stapling bindingglue binding