THICK CARDBOARD SHEETS-- You will get 10 pcs of particleboard measuring 11.6 x 8 in 4 thicknesses to choose from, 1.5mm/2mm/2.5mm/3mm. GREY CARDBOARD
VILLCASE 10pcs Cardboard mailing hardboard Book Board for Book Binding chip Board for Crafts Binder Board Scrapbook Accessories Canvas Panel Boards
40 Sheets Corrugated Cardboard Sheets 8.3 x 11.8 Inch Flat Cardboard Sheets 1/8”Thick Cardboard Insert for Crafts, Packing, Mailing, Art Project (White/Kraft Brown) : Office Products
2mm Thickness Kraft Chipboard Paper Card Cardstock Heavy Cardboard For Craft Cardmaking Size A4 - AliExpress
Bookboard - UK
Bookbinding Kits - UK
Thick Cardboard for Handmade Book Binding. 4 Sheets of 2mm Thick
Bookbinding Kits - UK
You will get 10 pcs of particleboard measuring 11.6 x 8 in 4 thicknesses to choose from, 1.5mm/2mm/2.5mm/3mm. thickened paper material for long-term
MAGICLULU 10 Pcs Chip Board, 11.6 x 8 Cardboard Sheets Book Board Binder Board for Book Binding Crafts Scrapbooking Picture Frame(Thick 2.5MM)
25 Chipboard Sheets 11 x 14 inch - 22pt (Point) Light Weight Brown Kraft Cardboard for Scrapbooking & Picture Frame Backing (.022 Caliper Thick) Paper Board
Thick Cardboard - UK
Bookboard - UK
Corrugated Cardboard Sheets for Crafting - UK
Thunderbolt Paper 4 Sheets Brown Chipboard 80 Point Extra Thick 11 x 17 Inches Tabloid|Ledger Size .080 Caliper XX Heavy Cardboard As Thick As 20 Sheets 20#Paper