Chipboard is a sturdy & heavyweight paperboard which can be used for mounting children's artwork creating crafts and decorations or even as a frame backing for photos and drawings. Available in 3 thicknesses;Thin 625gsm (1000 micron)Medium 1000gsm (1500 micron)Thick 1400gsm (2000 micron)841 x 594mmPack of 10 sheets.