This is thick paper (cardboard). The front is a matte white, and the back is gray. The size is 29.7cm x 20.7cm, which is close to A4 size (29.7cm x 21.0cm). The thickness is about 0.9mm. There are 30 sheets. It is thick and I think it is easy to use. As well 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 #HandmadeSupplies #PaperCraft #PaperCraftMaterials #PaperCraftSupplies #CraftPunch #DieCut #Paper #Paper #Cardboard #WhiteCardboard #WhitePaperboard #Chipboard #ChipboardPaper #ThickPaper #Crafts #Paperboard #BackingPaper #Bookbinding #Reinforcement #CoreMaterial #Protection #BookPackaging #MagazineProtection #MagazinePackaging #CardProtection #A4