Chipboard. I have a large quantity, so would anyone interested in crafting like to buy some? Size: Approximately 317mm x 466mm Color: Gray (color variations exist) Material: Thick paper Thickness: Approximately 1mm 40 sheets / 1556 yen ★Includes shipping★ I will create a dedicated listing, so please be sure to comment. *For home delivery, please specify the desired delivery date in a message. Please be aware that if the item needs to be resent, the buyer will be responsible for the return shipping costs. *Some corners may be slightly crushed, so I am offering them at a bargain price. (Please check the photos) *Shipping is not available during New Year's, weekends, holidays, Obon, and long holidays. *The cost of all paper materials has increased. #cartonnage #patterns #packingmaterials #materials #paper #cardboard #crafting