Cardboard Sheets - 15 Pieces (Thick cardboard that lace for crafts was wrapped around) These are the remaining pieces after use, and have some stains, wrinkles, damage, and warping. (See photos 2 and 3) These are thick, sturdy cardboard sheets that can be used as backing boards, etc. (They are difficult to cut with a cutter) Size: Approximately 24cm x 32cm Thickness: Approximately 2mm per sheet (approximately 3cm for 15 sheets) Weight: Approximately 100g per sheet (approximately 1.5kg for 15 sheets) Color: 9 sheets are gray on both sides, 6 sheets are white on both sides Quantity: 15 sheets total Sizes, thickness, and weight vary and are not uniform.