This is thick paper (cardboard). The front is a matte white, and the back is gray. The size is 12.1cm x 8.5cm. The thickness is about 0.7mm. The number of sheets is 140. It is thick and I think it is easy to use. As well 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 #papercraftmaterials #craftpunch #diecut #paper #paper #cardboard #whitecardboard #whitecardboard #chipboard #chipboardpaper #thickpaper #craft #cardboard #backingboard #bookbinding #reinforcement #corematerial #protection #packaging #bookpackaging #magazineprotection #magazinepackaging #pokecaprotection #pokecapackaging #cardprotection #cardpackaging #tradingcardprotection #tradingcardpackaging #tradingcardcompatible #yuupacketpostmini