This is thick paper (cardboard). The front is glossy white, and the back is gray. The size is A5 (21cm x 14.8cm). The thickness is about 0.4mm. The number of sheets is 100. In addition to being used as thick paper, how about using it for handmade crafts, artwork, backing paper, or materials? *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 #whitepaperboard #chipboard #chipboardpaper #thickpaper #craft #paperboard #backingpaper #bookbinding #reinforcement #corematerial #protection #bookpackaging #magazineprotection #magazinepackaging #cardprotection #A5