To Momo, the author, This is design paper. 4 types, 10 sheets each, for a total of 40 sheets. High-quality paper 90 Double-sided printing A4 size Will be shipped in a cardboard envelope. Combining with other products is welcome! Please use the bundle feature. I will discount the price here, so please do not request a price reduction. Please see my profile for details. Thank you very much.