This is thick paper (cardboard). Both sides are the same material, a slightly yellowish kraft-like cardboard than the image shows. The size is A4 (21.0cm x 29.7cm). The thickness is about 1.1mm, making it a thick type. The number of sheets is 25. It is quite thick and I think it will be easy to use. As well as thick paper, how about using it for handmade crafts, backing paper or materials for creating artwork? ※ Please note that the wrapping paper used to package the product is reused due to the recent rise in paper prices. #paper goods #specialty paper #handmade #handmade materials #handmade supplies #papercraft #papercraft materials #papercraft supplies #craft punch #die cut #paper #cardboard #cardboard #white cardboard #white paperboard #chipboard #chipboard paper #Pokemon card packaging #thick paper #craft #paperboard #backing paper #bookbinding #reinforcement #core material #photo protection #photo packaging #book packaging #A4