A3 Corrugated Cardboard Sheets for Packing, Mailing, Arts & Crafts. 3mm Thickness, (297 x 420 mm) Kraft Board Large Sheets, Protective Boards (10 24 Pack) LEO Design (24)

A3 corrugated cardboard sheets crafted from sturdy 3mm single-wall corrugated material. These 297 x 420 mm kraft board sheets provide maximum rigidity and structural strength for packaging, mailing, crafting, and protective storage applications. A3 rigid Backing board for prints are premium 3mm thick single-wall corrugated construction with 3 layers of durable kraft board. Designed to offer exceptional stability and crush resistance while maintaining a lightweight, easy-to-handle profile for all your project needs. A3 Cardboard Divider is versatile protective inserts perfect for separating prints, artwork, photos, postcards, and magazines during mailing. Also ideal for flower pressing, welcome signs, photo frames, and office organization projects. Generous A3 dimensions measuring 29.7 x 42 cm (11.7 x 16.5 inches) providing ample surface area for school projects, dioramas, display boards, craft boxes, and creative DIY applications. Manufactured in Britain from high-quality, recyclable corrugated cardboard. The traditional kraft brown finish offers a natural, professional appearance suitable for both practical packaging and creative crafting projects. DURABLE CONSTRUCTION: 3mm thickness single wall corrugated design provides structural strength and stability for packaging, mailing, and creative projects TRADITIONAL KRAFT BROWN: Classic brown colored cardboard sheets that provide a natural appearance suitable for various crafting and packaging needs