This is thick paper (cardboard). The front is a matte white, and the back is gray. The size is 20.0cm x 14.5cm, which is close to A5 size (21.0cm x 14.8cm). The thickness is about 0.9mm. The number of sheets is 60. It is thick and I think it is easy to use. How about using it not only as thick paper, but also as backing paper or material for handmade crafts and artwork? *Please note that the wrapping paper used to package the product is reused due to the recent rise in paper prices. #papergoods #specialtypaper #handmade #handmadematerials #handmadematerial #papercraft #papercraftmaterials #papercraftmaterials #craftpunch #diecut #paper #paper #cardboard #whitecardboard #whitecardboard #chipboard #chipboardpaper #thickpaper #craft #cardboard #backingpaper #bookbinding #reinforcement #corematerial #protection #bookpackaging #magazineprotection #photopackaging #photoprotection #magazinepackaging #cardprotection #A5 #yuupacketpostmini