This is thick paper (cardboard). The front is a matte white, and the back is gray. The size is 18.2cm x 14.4cm. The thickness is about 1.0mm. There are 60 sheets. It's thick and sturdy, and I think it's easy to use. In addition to being used as thick paper, how about using it for handmade crafts, artwork, or as a backing board or material for your creations? *Please note that the wrapping paper used to package the product is reused due to the recent rise in paper prices. Thank you for your understanding. m(_ _)m #papergoods #specialtypaper #handmade #handmadematerials #handmadematerial #papercraft #papercraftmaterials #papercraftmaterial #craftpunch #diecut #paper #paper #cardboard #whitecardboard #whitecardboard #chipboard #chipboardpaper #thickpaper #craft #cardboard #backingboard #bookbinding #reinforcement #corematerial #protection #bookpackaging #magazineprotection #photopackaging #photoprotection #magazinepackaging #cardprotection #A5 #yuupacketpostmini