【Cardboard, Protective Paper, Packing Board, Cardboard, Large Envelope, Reinforcement Cardboard, Craft Paper, Packing Materials】 Cardboard...100 sheets Length...approx. 24cm, Width...approx. 11cm Thickness...approx. 0.7mm The size is similar to a Nagagata 3 envelope. Please refer to image 2 (envelope not included). The color of the cardboard is light gray, and it seems to have relatively good strength. I think it is weak against water. If you have any questions, please feel free to comment. #Cardboard #ReinforcementPaper #CraftPaper #Cardboard #ProtectivePaper #PaddingPaper #MountingBoard #PreventingBending #Nagagata3Cardboard #PackagingMaterials #PackingMaterials